Tips for Exterior Painting with Airless Spray Gun

Painting for exterior design can be a bit different compared to painting for interior design. This is why we need different techniques when it comes to exterior painting jobs. But before we come to the tips, we need to know the right tools to finish the job and there’s no more better way to deliver paint onto a surface than with airless spray gun. In addition, you also need paint brush and roller to make perfect your work. Now, you have all the tools, here are some tips that will make you paint like an ace!

Adjust the Sprayer, Starting with Low Pressure
Adjusting the proper pressure setting on the sprayer will rely on the thickness of the paint. Therefore, the best way to start it by setting the pressure on low and make a pass on a scrap piece of cardboard or rosin paper. But, you need to be more careful as setting the pressure too low will make the result uneven and there’ll be “fingers” on the edges. Set up the pressure until you get a nice, even spray pattern with a consistent edge. If after the pressure all the setting the pattern still looks poor, you may need to change your tip size one goes up.

Keep the Sprayer Gun Upright to the Wall
The tip of the sprayer should be held about 12 in from the wall with the gun remain upright to the wall.  In fact, this is the basic technique for a professional finish. At first, the result might not satisfy you yet, but after only a few passes you’ll be painting like a pro. Practice on a low-visibility wall until you nail it.

Overlap 50 Percent
Release the trigger at the end of each pass and overlap the pattern for about 50 percent. Before pulling the trigger you can start the gun in motion. Point the tip upward to get enough paint on the bottom portion of the board when spraying under lap siding or the side of trim boards. Bear in mind to always start at the top of the wall and work your way down.

Back Brush and Back-Roll
If you think that spraying paint all over your wall is enough, you are wrong! As paint sprayer is only a paint delivery system. To make the paint stick to the surface for years, you need to push the paint into every crack and crevice and underneath every lap with a brush, after that, back-roll the paint with paint roller. Hence, don’t spray width area all at once as the paint could be dried before you can roll it out.

Pay Attention to the Weather
The best weather for painting is a cloudy weather as direct sunlight will make the paint dries before you have time to back brush and back roll. Moreover, rainy day is also impossible for painting. That is why; cloudy weather is the best weather for painting.

Reverse the Tip to Purge Clogs
Most Spray Tips are reversible the arrow as they have an arrow on them. When your sprayer starts producing an uneven spray pattern, you may have a clog in the tip. If that happens, you can turn the tip 180 degrees and spray some paint onto a piece of cardboard or rosin paper for a while. After that, turn back the tip and continue painting. This will help you purge the debris. But, if this way doesn’t work, you need to clean the tip or one or more of the inline filters.

 

5 Basic Techniques to Spray Paint like a Pro

Some people think that painting with sprayer is easier than painting with paint roller or brush. But, if you’re not familiar with it, the results can be disappointing. Therefore, to prevent you from making any errors in your painting projects, you can read the following techniques. In fact, there are many things that you can take as a good consideration when it comes to spray painting. Here are them:

Using a Spray Gun
If you paint for a living, you better buy a spray gun with a compressor. This tool works best at a large painting job and it produces you with a fine spray. A spray gun uses the air delivered from your compressor to draw paint from a paint basin. Then, burst it through a nozzle.

Basic Spray Paint Techniques
It is important to clean, free of rust and debris, and smooth your surface with sandpaper or steel wool before using a lint-free cloth to remove any remaining dust. This is because any surface bumps or imperfections will appear through the paint.

After cleaning the object, you can start with a can of spray paint. Shake it for 3 or 4 minutes to mix the paint thoroughly. Make a space between the can and surface for about 10” to 12”, aimed to one side. Then, in one fluid motion, move the paint horizontally across the surface. Don’t forget to use your entire arm when moving the can. Moreover, drying time can be different at different rates. So, you can read the instructions on the back of the can to know more about its drying time.

Painting Small Objects
If your object is small, you can use a paint booth to reduce overspray. Then, you can use a cardboard box on its side to set up a makeshift paint booth. Place the object on a turntable. This will help you paint from all angles easier as it allows you to spin it without touching.

Use a Respirator
Most of spray paint fumes contain toxic, so you better wear a mask or a respirator. However, we suggest you to use a respirator for better protection than a mask which offers a very little protection.

A respirator may be a little expensive compared to a mask. But, it is still much cheaper than going to the doctor for respiratory problems. A respirator with replaceable filter costs just $20 or $30 and it will survive many paint projects. So, in the long run a respirator is safer and cheaper than a mask.

Reviving Old Cans of Paint
After several usages, sometimes a spray paint will stop to spray. If this happens you can remove the nozzle. Then, soak it overnight in mineral spirits or paint thinner to dissolve the paint.

If the above technique does not work for you, you can put the can in a bucket of hot water. This will reduce the adhesiveness of the paint and help the pressure in the can. Remember to use hot water not boiling water.

Steps on How to Set Up HVLP Spray Guns

There are many types of spray gun. One of them is HVLP spray gun. When it comes to set up HVLP guns there are three things that you should consider. They are air supply, the right tip size, and your spray test. So, let’s see how these three things can make your HVLP guns run well.

Air Supply

In order to operate right, HVLP guns take a high volume of air. The directions for your gun will tell you the minimum cfm it needs to operate. Therefore, you need to make sure that your compressor is strong enough to create a constant pressure. In fact, you need to set your compressor for about 90 psi.

Remember to check a way to set the air pressure where it enters the gun. They make small regulators with gauges that attach to the base of your gun.

They look like this:

If you have any water or oil in your air lines, it will ruin your work. Therefore, you will need an air dryer. It’s a good idea to put one of the little disposable ones on the end of your gun; therefore you need one that mounts to the wall preferably.

The right tip

The ‘tip’ is where the fluid outs. What you’re shooting for is the smallest tip that will work right. You can find your tip size for each tech sheet for the material you are shooting. For your information, a good rule of thumb is about a 1.0 tip for doing small jobs like a single panel or small part. 1.3 or 1.4 for applying paint or clear to a whole car. You can use this guide for sealers and epoxys or etching primers. For building primers, you may need a bigger tip 1.8 to 2.3 depending on the thickness.

Spray test

It is important to set up your gun before you are going to use it. However, other external factors, such as humidity, or temperature can affect the result of your gun shoots.

Set your pressure at the gun inlet. Use your air regulator which is attached to the gun with gauge. Set it about 50 psi on the gauge to start. Close the air volume control knob and then with the trigger pulled, remember to open it to the point where the volume stays the same to set your air pressure and volume.

What you’re shooting for is a fan about 6 inches tall with the gun about 6 inches from the surface 6” at 6”. Then screw the material knob until it seats in lightly. Now unscrew it about 2 ½ turns.

Now, you are ready to put your spray gun to the test. From the spray of your gun shoot, you can see what’s wrong with your gun. The picture below will show you.

Things You Need to Look For Find the best Automotive Spray Gun

Choosing the best spray gun sometimes can be confusing for there are a variety of spray guns. Therefore, the best advice always depends on what the person’s need. To know what you need in a spray gun, you can discover it in through four ways. They include quality, type, cost and many others. If right now, you are looking for a spray gun, this article can be a nice guide for you.

Quality
Quality of the paint gun is one of the most important factors that can determine the result. Paint gun with low quality standards will likely produce a low quality paint job. Therefore, to avoid you from buying low quality standard of airless spray gun or paint gun, you better shop from some of the most trusted names.

Type
There are three basic type of spray gun. They include conventional, airless and HVLP. To power and push out the paint, the conventional sprayers will actually use an air compressor. An airless sprayer uses electrical or battery power, and the HVLP uses low pressure and low air. Since all of them have their own advantages and disadvantages, so you better research it first.

Cost
If you are looking for a paint gun for one usage, it may not be cost effective. Some of the lower end and the higher end models can start out around $100 and up. While the higher end models can start out around $500 and go up from there. But the cost will be worth it if you are planning to start out a vehicle painting business.

Choosing Just One
Since there are so many different models on the market, it will be confusing to choose just one. Therefore as a solution you can compare various factors, such as the specifications, features, price, and consumer likability. By knowing this information, you can make your decision a whole lot easier. But, bear in mind that quality should come before cost.

 

Tips on Choosing a Compressor for your HVLP Spray Gun

Are you planning on working with an HVLP airless spray gun? If yes, then the next thing you should do is to find the right type of compressor. Finding good compressor is important in order to producing the solid mist of spray for proper coverage. So, how to know if a compressor is a good match to your HVLP spray gun? Below are the answers for your questions.

Step 1- Using the Manual

When you buy a set of HVLP a spray gun, they will come with several sets of specifications. All you have to do is looking for the recommend CFM@PSI settings. These settings will tell you everything you need in a compressor. CFM is an acronym for Cubic Feet per Minute which tells you about volume information. On the other hand, PSI is an acronym for Pounds per Square Inch which tells you about pressure information. As HVLP sprays using only a low pressure, the pressure figure might well be low.

Step 2- Maximum Ratings

Look at the highest CFM rating for your HVLP spray gun, when you’ve located these figures in the manual. You can add 50 per cent to that amount to know the highest rating of an air compressor for your spray gun.  You can have a leeway of 15 per cent within that. So, any compressor within that range will work well on your HVLP spray gun without becoming overtaxed.

Step 3- Research

After getting the right specification for your compressor, you can start searching a range of air compressors. Use your specification as a guide to discover the compressor that can satisfy your demands. Contact them directly after gathering a short list of possible air compressors to get a fuller breakdown of their specifications.

Step 4- Budget

Other thing that you should consider when it comes to buying an air compressor is the cost. You might find what you need but the cost can be too expensive. So, it is better to find an air compressor that not only fit your need but also fit your budget. Don’t forget to always investigate its length and extent of the warranty.

Step 5- Testing

You cannot find the right compressor without trying to test it. So, keep the receipt from the store. Then, test the compressor with the spray gun. Return the goods, once you find it doesn’t meet your needs.

The Types of Sprayers

In general, you can find four basic kinds of paint sprayers. They are hand-held cup gun sprayers, airless paint sprayer, air sprayers and high volume low pressure (HVLP) sprayers. Each type is designed to meet different needs of painters.  Cup gun sprayers are usually for beginners because they are easier to use and are perfect for smaller jobs. Since they create a higher quality finish, air sprayers are used for automotive work.

If you want to paint for large areas whether inside or outside, then airless sprayer is the right option for you. However, if you want to minimize the overspray resulting in a cleaner job with less waste, then high-volume low-pressure sprayer is the most effective tools for that. But, these sprayers work best for indoor projects.

Another type is the cup gun paint sprayer which is great as they are easy to operate and are reasonably priced. The price is at about a hundred dollars or less. You can find them easily at hardware and home improvements stores. These sprayers usually hold about one quart of paint making them ideal for small painting jobs around the house.

You can spray your large wall within each minute with multiple guns and hoses that spray over a gallon of paint each minute. Moreover, if you would like to work with stains and lacquers, you can buy sprays with pressure control settings. By this setting, the paint can be sprayed at fan widths from two to twenty-four inches.

Since larger airless sprayer is more expensive than an ordinary airless sprayer, so you better use them for larger projects like painting a basement, and etc. This type of sprayer works faster, about a half-gallon per minute. This makes it great for projects that need to be finished quickly.

However, you can consider using an HVLP sprayer for smooth or mirror-finish look such as trim, cabinets or some furnishings. You can also use conventional air compressor powered sprayers but they may produce too much overspray. This is why, it is important to understand different purposes of sprayers.

Choosing Nozzle Setups for Spray Gun

So, what type of nozzle setups should you use for your spray gun? Actually, you’ll achieve the best results when you refer to the paint manufacturer’s technical data sheets for that particular product you’re spraying. There are many nozzles that you can find, but each nozzle has been prepared to meet the features of the best needle nozzle combination for each product.

A general rule of thumb is:

  • When you use a nozzle size of 1.7 to 2.2, heavy-bodied primers and primer surfaces will work best on it.
  • Basecoats should be sprayed with a 1.4 to 1.6 nozzle.
  • Clear coats should be sprayed with a 1.3 to 1.7 nozzle.
  • Sealers and single-stage urethanes should be sprayed with 1.4 to 1.6 nozzles.

That is the general rule of thumb and many painters choose to go against the norm and are able to produce outstanding results from unorthodox methods.

Generally, you should go down in nozzle size to break the material down into smaller particles to get a smoother finish, when you have a high-solids clear coat or single-stage urethane. You should go down in nozzle size to break the material down into smaller particles to get a smoother finish. However, some spray gun manufacturers have gone against this rule and gone up in size. So, be sure to refer to the gun manufacturer’s recommendation as well as to the recommendation from the paint company.

Primer surfaces will require a much larger fluid nozzle. No material is deposited on the repair area as thick primer surfaces won’t go through a small fluid nozzle. In fact, some painters have complaint that the primer was spraying dry and adhesion was poor. This is because his body work wasn’t being covered and the primer was flaking off, even though he already uses a very high-building product. The reason is because he uses 1.3 fluid nozzles while in reality, he should at least use a 1.7 nozzle. This is what will happen when you don’t study your product very well.