I need to know how to bond fiberglass to metal myself. my '67 Falcon had/ has 1 rotten out rear wheel well, nobody makes repo 1/4's for it, and a original will cost 3-600 from a place like desert valley or memory lane, so I got out some renyolds release tin foil, duct taped it neatly to my other side 1/4 panal ( is still in tact but marginilly rough ), got out some fiberglass putty and fiberglass cloth, carfully laid it over the tin foil, and puttied it up good, and let it dry, I now have a fiberglass patch panal ( reversed but it will work for a driver ) that I don't know how to attach, it lines up and fits ok, but I don't know how I should attach it, I was thinking scuff the metal mating surface and use my fiberglass putty over it, then stick it on and let it dry, but I want to make shure it will hold. ideas please? Thanks in advance.