central peumatic or whatever the harbor freight gun is. its their slightly more expensive gun (like $70 lol). the first two cars i did like this i thinned 1 to 3 using white, but it was so cold when i did my supra that i had to thin it 1 to 2. the white seemed to run a little easier (even though it was mixed thicker) but the black shows every little spec of anything in it. once it is wetsanded its gonna look great.