ok i have a 4th gen spoiler and im adding some fiberglass extension to it so...what im going to do is cut the top off and build a custom fiberglass top to it so what do i use to bond the f-glass to the SMC that GM used on these spoilers would i use f-glass resin or what ..anyway any help from PROFESSIONALS would be greatly appreciated

 

If you want professional advice, take it to a shop and pay them for it. This is a hobbiest board.

 

Thier is no way that I could talk you through a major thing like what your doing but if you want to know what I use to do this it would be duraglass Made by UCS it is the best fiberglass putty I have used!

 

talk to johnny iroc, he did what you're talking about to his car.