When we sprayed Acrylic Lacquer we mixed 1:1 50/50 just equal parts to get the Car covered , usually 6 coats or so , then sand a bit , then maybe 1 or 2 coats and then mix 1:1.5 (1.5 is Lacquer thinner) , then mix some clear into the color and thin 1:1.5 (just to make thing flow a bit mre better) now as mentioned PPG was thinned more , the paint we used was R&M , if you want to be really dead on use a viscosity gauge , it also depends on if the Lacquer has dried a bit from sitting because it will be thicker , I like Black Lacquer paint it looks really nice , or black single stage for a Black Car but as was mentioned there are way better Paints made today than Lacquer.
