nothing wrong with kirker paints...just one hint, if you want to use a urethane hardner (unless you wish to wipe the paint off with gasoline, lacquer thinner, or just about any other solevent, you want hardner) go buy a pint of GOOD hardner (dupont centauri, or something comperable) the better hardner will give you an awesome shine, and the gloss wont die back as most of the cheaper urethanes are known to do... i painted an intake years ago with western enamel, using sherwin williams hardner. it still has as nice of a gloss today as it did the day i painted it. only down side is you are getting away from the $50.00 paint job...and as far as using that 20 year old spray gun, if you buy a true hvlp gun, and have it set right when you use it, you are going to use far less paint in the long run.