I did as the wife suggested and traced part of a car on wrapping paper we had left over from moving, hence all the little blue pieces of tape. I started with the middle needle size that came with the gun and the color was red. You can see that I had a blow-out near the "G" in GT-3. I changed color and tips and things got much better. Still learing how to get the size of spray I want and since these are not to look real, except for the Vettes, I think I am ready to start on the the cars. It will take time and comfort is going to be a bit of a hassle on the one over the sink. Hopefully I will get the aid of the graphic designer / industrial designer in the family for blending and high lighting. I can buy chrome paint as well as metallic but I don't see the need unless I have to do it myself.