Fibreglass Distortion

[mikeinatlanta]

People often use the word fiberglass, while it is actually a composite of fiberglass and resin. The glass is fairly generic, however, the overall characteristics are determined by the resin. In the case of FFR, they use a high quality vinylester resin that can easily handle your under hood temps if properly mixed and cured. The cure portion of this is where FFR doesn't quite finish the job, and anyone wanting a show quality finish really should. If the resin is only cured at room temperature it will never reach its full potential and the result will be minor movement and a reduced glass transition temperature (goes soft with heat). This issue is less common when the body is left to sit in the sun over a summer, but it will still never reach full potential without a proper post cure cook.

It's obviously too late for you, but others can minimize this risk by having the body placed in a powder coating over for a few hours at 150-160 before doing bodywork.

EDIT: With the heat generated by your motor and age, your hood is most likely stable now. At this point a repair should last.