Quote Originally Posted by John Brian
Dave:
The cab, including the underside has been blasted and primed. Would it be necessary to sand etc. before applying the bedliner?
It would probably be best to scuff the primer, maybe some 400 grit to get better adhesion. All you will need to do is sand enough to break the glaze off the top of the primer.... Should be enough to get good chemical and mechanical adhesion with some light sanding. The grit required depends on the primer used and how long it's been on there. Might be best to check the product sheet for the primer used and see what their recomendation is for sanding the primer prior to paint, then I'd think one grit more coarse would work just fine.