Right Place for Painting Advise?

Using a moisture filter is a good idea. It is no substitute for good maintenance on the compressor's air tank. Most air tanks have a drain on them. After finishing for the day, it is a good idea to level the tank and leave the drain open. This lets condensation flow out. Remember to close the drain just before starting up again.

Get the cfm requirement of your spray gun and the output of the compressor. If the compressor can't keep up with the gun, it can be frustrating. Some of a deficit can be offset by good technique. A good even spray tends to lessen the demand on the air tank.