Here is a link to a pair of door panels I refreshed recently.
http://67-72chevytrucks.com/vboard/s...d.php?t=778753
The key is using the right products and cleaning the surface properly before treating. I used all SEM products, the adhesion promoter and the colors SEM has it a mach for our trucks. Also important that they are the right sheen. I used a carpet scrub brush and simple green to make sure it was really clean, then I rinsed and did it again. After all was dry I tack it down and applied adhesion promoter, then followed with three coats of color.
Here is a before and after image.