I have some cracks on one of my rear fenders. If I put a fiber glass patch on the underneath side will the fiber glass stick to the plastic material? Now on the front side of the fender if I grind out the crack, and use body filler will it stick? Has anyone had any experience doing this? Thanks for any info. Stan

 

i used JB wield on the inside and used a grinder. on the out side and filled i back in with auto bondow stuff and got it repainted but it worked fine to this day... so id go for it