The frist you need to paint a good looking body is alot of patience. Take your time because you will need to keep spraying light coats untill you can't see through it anymore. Don't just put on one solid coat it will look uneven. Also make nice slow passes across the body dont just spary one spot at a time. You won't really need a backing coat unless you used like indy silver on like the 3rd coat just to make it look metallic. Hope this helps.