I got tired of using minwax lacquer for my projects and decided to try something else, hopefully better. I went to sherwin williams and they have a whole line of product finishes for professionals. I asked about lacquers and polyurethanes and the guy gave me a gallon of shurwood precat lacquer to try. I did't have to pay a dime for it. I am about ready to start spraying some tables and was wondering how long I can let precat lacquer sit in the spray gun. I know with nitro lacquer I can basically leave it in the gun practically forever. Do I need to clean out the gun between coats, I will probably do 3 coats they may not be all the same day though.