Hi, im painting my truck with this type of paint, Ace hardware rust stop enamel. Im getting alot of brush strokes in the paint even after it sits and drys, i think its probably too thick, about how much thinner did yall have to put in the paint per can? Im using a foam brush to apply it and i prepped with 320 grit and ive been wetsanding with 800 then doing more coats. i think ill go to a higher grit later but i cant get the brush strokes out.