WHY SPRAY PAINT?
Well, two good reasons come to mind:
Spray painting is the least costly and the fastest of the three primary methods -- brush, roller and spray.
The more irregular the space being painted, the greater the advantage of spray over other methods.
An airless spray rig consists of the pumping unit, hose and a gun.
No compressor is needed because the paint is pumped through the high pressure hose and forced thru very small tips which break up the paint into various size spray pattern fans. The biggest advantage to airless spraying is that since no air is used to force the paint out, there is very little overspray and the air in the room is not filled with paint laden mist. The amount of paint delived is determined by the size of the tip used and by the amount of pressure used. Tips normally are numbered in thousands of an inch. Example: .019 tip indicates a large tip suitable for most latex paint, a .015 would be ideal for oil base paints, enamels and varnish coatings.
CAUTION: The pressure at the tip is normally in the 2000-3000 psi range and it can not only cause a severe cut but also inject paint into your skin! Keep your hands and fingers free of the tip while pressure is on the machine! IF you are unfortunate and do inject paint into your skin go to a hospital Immediately!!! Do Not Try Simple First Aid, some paints have toxins in them that must be treated by a physican.
Tools and equipment you will need include,
A 5 gallon bucket to mix all your paint together, (known as boxing the paint), to insure you have the same color throughout the mix.
Masking tape and lots of plastic to mask off areas not to be painted
A spray mask, disposable 3M dust masks are fine for most latex paints.
A hat, long sleeve shirt, and some hand cream or lotion for your exposed skin.
When you pickup your spray unit from the paint store or rental store ask for an "extension" for the gun. These simply screw onto the gun allowing you extended reach and eliminating a lot of climbing up and down a ladder.
Mix all your paint into the 5 gallon pail, insert the suction tube from the pump into the bucket or fill the hopper depending on which unit type you have, make sure all your fittings are tight.
Now, all units have two control knobs, a pressure control and a pump/recirculate knob. In the recirculate mode the paint simply recirulates thru the unit, pumping out trapped air and allows the pump to prime.
Turn the knob to recirculate and turn on the power switch. Allow the pump to run for 2 minutes or so and it will prime and push out any trapped air. Now we are going to adjust the pressure.
The biggest mistake most people, even some professionals, is spraying with too much pressure.
You need just enough pressure to create an even fan with no "tails" which are thick lines at the edge of the spray pattern.
Backout ( decrease ) the pressure knob all the way and then screw it in about 1/3rd of the way (screwing in increases pressure on most sprayers ), point the gun at the surface to be painted or a piece of cardboard for testing and with your hand in motion, pull the trigger. If you see a thick stream at the edge of the fan increase the pressure 1/4 turn at a time until the tail is gone. Now you have the proper amount of pressure for the material you are spraying.
Technique!!!
Every time you pull the trigger you must follow the same routine. Remember that the second you pull the trigger the paint comes out instantly so, start your hand in motion first and then pull the trigger, release the trigger just before you reach the stopping point of your swing., just remember...
hand in motion, pull trigger, spray, release trigger, stop hand motion. Should you mess up and load an area with too much paint simply take a brush and spread it out.
Maximum transfer of paint is accomplished by holding the gun at the proper distance from the surface to be painted. Too close and you apply too much paint, too far away and you introduce a lot of spray into the air as it is not hitting the surface. This distance varies and depends on the amount of pressure you are using and the viscosity of the paint so experiment until you find the proper distance, normally 12" or so is about right.
Cut pieces of cardboard about 12" wide an 3' long and use them as a shield holding them up against the areas you want to protect. Have several on hand and when the shield becomes loaded with paint switch to a new one. Its a good idea to keep a bucket of clean water and a sponge handy too, you are going to slip up and spray something you don't want painted, cleaning is easy before the paint dries.
When you have finished be sure and clean the equipment up, most rental places charge a pretty hefty cleaning charge if you return the unit dirty.
Cleaning: Turn the unit off.
The spray hose has about 1 qt of paint in it and you can save it by pumping it back into your paint bucket using water.
Put the paint suction tube into a clean bucket of water, back off on the pressure. Put the gun into the 5 gallon pail of paint. Holding the tip of the gun just under the surface of the paint, turn the unit on and increase the pressure just enough so that it pumps the paint. As soon as you see the water coming out release the trigger. Move the gun over to the bucket of water again holding the tip just under the surface, pump the water for about 1-2 minutes. Dump the water repeat the process until the water runs clean. Normally 3-4 rinses are necessary.
Power OFF! Now trigger the gun to release the pressure , clean off the exterior of the gun with a wire brush, remove the tip, clean it well and replace it. Be sure and replace the filters before returning the unit if you removed them earlier.
RELATED:
General Painting Tips
How to use a paint roller with No Mess
Painting Interior Ceilings
Paint Interior Walls & Trim
Attics, Spray on a Radiant Barrier Coating
Insulating Roof Coating Application
Painting Roofs on RV's, Buses, Mobile Homes
Exterior Stucco and Masonry
Exterior Wood,Metal and Vinyl siding
Prices & Ordering Information
Why Wait? Buy Insulating House Paint, Use it,
Cut Those Utility Bills and Start Saving Now!
Safe, Non-Toxic, and Environmentally Friendly
