When You Go In To Match The Paint ,and Find Out If It Is Base -clear. You Can Ask Them Some Questions.generaly You Don't Sand Between B/c. And I'd Say 400-600 B-4 Paint. Probably Gona Wana
Get Some Primer In There In The Middle.(again Needs To Be Compatable With Paint System. Single Stage Is Eaiser Imo If You Can Match The Color Well Enougph May Want To Go That Route.(and Less $)