I too use Testors Clear, the Model Master High Gloss Clearcoat number 2936. Its cheaper to buy it in the little bottles and airbrush it, but what I do is use the rattle can and before spraying the model or part or parts, ill heat it up (the can) in very hot tap water. That way it is highly atomized and always comes out with out any orange peel and lays very smooth that way. And as far as decals that are non race car decals ill do as Raul_Perez and others on this forum, spray the decal, let it dry, wet sand with 2000, spray again, let dry wetsand repeat until there are no edges. I also do spray, sand, respray for my lowrider paint jobs that have multi painted patterns to get rid of any tape edges.....The good thing about sanding between the coats is to also get rid of enough of the clear coat so that it doesnt build up and make the model look as if it was dipped in a jar of clear coat. This eliminates that problem. I have sprayed as many as 10-15 coats of clear on a lowrider model to get rid of any tape edges and by sanding each coat it looks as if it has had only 2-3 coats of total paint.