Like others have said, prep is the key. Wash, clay, machine polish if needed (hand polishing is fine if you don't have a machine), compound is not necessary unless your paint is in really bad shape, then wipe down with the prep and apply the Graphene. Since you already have ceramic on it, and you're a novice, you might want to try the Graphene Spray Coating instead of the full graphene. I've been using the GSC for several years now and I live in PA where we get crappy winters, lots of salt on the roads, and a lot of slush and slop. The coating usually holds up through the fall and winter into late spring for me. Your choice for which one you use, but the prep is the same for both.