CB Cafe seat build...and a question

[Blue Roller]

Here's a new seat build for a '73 CB 350 F.

I'd like to thank everyone who has posted pictures and writeups of their own seat builds on this site. That has been all the inspiration and instruction I've needed for this project thus far. Up to this point everything has gone pretty well but I've come to a point where I need some advice.

I made up a "frame" of 3/4" plywood and then filled in the open spaces with that "great stuff" expanding foam in a can. It went pretty well, but, after i shaped the foam, it shrank. I went ahead anyway and covered the foam with tape and made a papier mache mock up. Everything fine there.

I'm going to pull out the old foam and replace it with green "craft foam". It's less spongy than the expanding stuff and won't shrink. Herre's my question, what can I cover the mold with so that the fiberglass won't stick to it?

 

[HerrDeacon]

Looking good so far Blue Roller. When I made my seat I covered some of the foam with masking tape and some with tin foil. If I had my time back I would have used tin foil on the whole thing as it was much easier to take the hardened fibreglass off the tin foil part then the taped. I stuck the tin foil to the foam using spray adhesive.

Best of luck and post some pics as you progress.

 

[Herm21]

Yup foil will work too. I used painters tape because it really doesn’t leave any creasing where the glass is laid, and it already has somewhat of a "waxed" type backing, but just to be safe I then threw on a coat of car wax over the tape and in the end it really did come off the fiberglass very easily. Good luck Blue!