twlinks
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The Graco is an "airless" sprayer, it uses an electric pump so you're not hooked up to an air compressor. There is an adjustment on it that is essentially the same as adjusting the amount of air from a compressor...if you turn it down too low, you get streaks (not good) and if you turn it up too high, you get a ton of blow back and throw way too much paint out which is almost impossible to control your coverage (also not good). This is why I suggested playing with whatever system you decide to use. Practice on a sheet of cardboard or something until you get the flow and coverage you are looking for. As with any paint spray, less is usually better, meaning several light coats is much better than one heavy coat. A heavy coat may look good as it's going on, but you'll have runs or sags in it if you're painting anything vertical. Even with the pressure right, it's easy to mess up...hose gets hung up on something, you bump into something, etc. That's kind of hard to explain, but you'll find out when you start spraying. ALWAYS start your spray ahead of what you are spraying and release after you make your pass. Keep the gun on the same plane during the entire pass. Most everyone that hasn't sprayed before will swing their arm in an arc, which is very bad, both ends of the arc are lighter in coverage than the middle. It's not too difficult to keep the gun on plane on the side of a house but on a vehicle where you are trying to get into little areas and stuff it is hard. Accept the fact that you are going to have to get into some of those areas with a brush or roller and you'll end up with a better overall paint job. I'm assuming that you aren't taking everything apart, meaning fenders and doors off, etc. That's one of the beauty's of using latex house paint, you can touch it up easily and it's seldom going to show. If you use anything other than flat though, any touch up will show in the right light.What air presure should be used ????