My VW Notchback project will have a fiberglass front end. The rear fenders will remain but I don't want to bolt them on requiring the use of the plastic spacer that's supposed to go in between the fender and the body. I want to permanantly mount the rear fenders to the body but I have a problem.

What do I do about the gap between the fender and the body?

I think I can bend the flange in along the fender and make it fit tighter against the body, but then what? There will still be a "crack" along where the fender meets the body along the side of the car and down the back where it meets the rear valance. Should I use a body filler of some sort? Should I at least tack weld it along the outside?

Has anyone succesfully done this before? Do you know of someone who has done this who will not mind a few questions?