I need to repaint the roof of my Sprinter van.

Its not badly rusted or anything, but it looks a bit thin, and could do with a coat on top.
Especially before I bond the Solar Panels to the roof! Basically to have minimal number of holes in the roof.

SO.. what does the Team Think?
Rustoleum or POR15, or something else.
Its a 2001 Merc Sprinter, and I dont know what sort of paint is already on it.

Thanks

Geoff
(Still missing my Viento)


EDIT:
Its on top of the roof, so wont be seen. Namely the finish / orange peel effect etc is not a problem here.
Just a good solid covering / sealing etc is more important.



[Edited on 13/8/2014 by wilkingj]