[stephen low]

Stumpeater

I'd assume the body work is made up from polyester glass and not epoxy but there is one golden rule in glassing.

You can bond epoxy to epoxy, poly to poly, epoxy to poly but NOT poly to epoxy.

So starting with the first assumption stick with polyester and the Chook man is right, Q cells or even another better derivative design for improved sanding, and whose name escapes me for now, allow a resin mix to be nicely thickened.

You wont need much but adding bulk to a polyester mix also helps speed up the curing process that is partly driven by heat so you need to watch ratios and application times to a degree.

Just be fully prepared when you do the job so as to not loose time.

Have fun.