Paint Gun Help

Jim, thats what i was saying , if you spray lacquer all the time you need a gun without that rubber o ring, lacquer and its thinner dissolve that rubber o rings,i have a friend that makes kitchen cabinets and bathroom vanities, he was the one that taught me if you spray lacquer, you need a gun without those rubber o rings, i told him he was full of crap. he had a gun for urethane and one for lacquer, he took them apart and laid them on the table, and the one he used for lacquer didn't have rubber o rings anywhere in it, they looked like brass, and he said its according to which type paint you use to which gun he used, and he said he uses acetone to clean the urethane gun, and lacquer thinner for the other., my gun that was leaking had a small rubber o ring in the front and one on the paint cup, went to a local hardware and got replacement rings for about a dollar for both and i replace them if i happen to spray lacquer