where do the key markes start and end? If they start in the very front of the door and end on the very back of the door, then blending will be need to the fender and bed or if you have a good space on the cab corner. If not then just some blending to the doors will be neened. But they will probley father out the key markers with some 320 on a d/a and then prime, and block the primer with there finanly sanding paper (400-600 grit) for piant.