yea you should sanded is cleaned it and sanded it again, you also prolly shouldve index carded all around the wheel, its better than taping it and easier getting it off... if you look closely im sure we could spot marks whereyou missed right where the rim and the tire meet, also anytime u get new tires... the paint job is going to be ****ed, when they change them they are going to ding the **** out of them... and... yea, powder coating ftw.