What do you use to thin out alkyd paint?

alkyd enamel..

if spraying the best thing to use is naptha. flashes fast and gives the best shine. mix 8:4:1, 8 parts paint, 4 parts naptha, i part enamel hardener. you don't need the hardener, but it will cure much faster and be stronger and shine better. if your spraying in the sun or real hot weather, subsatute mineral spirts for the naptha. it will flash slower and give you time to keep the project wet for the last coat and avoid dry (dull) spots. you can do a mix of naptha and mineral spirts to get the right flash you need. if your brushing/rolling , use naptha.