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IMHO, if its very big at all, I would get a good used hood. C4 hoods are pretty cheap. The corner would be easy to re-damage just by opening and closing the hood. You didnt mention how much broke off?
Completely non-helpful and un-related, but this reminds me of the time I drove the pass. tip of the hood through my garage ceiling while lowering my car off of jackstands Whoops! Nothing a little rubber mallet and hand-caressing couldn't fix.
I would super glue a piece of aluminum under the hood damaged area coated with mold release agent, and add a buildup of fiberglass cloth and resin till I got a substantial amount of reinforced material attached, then use a gasket scraper and a hammer, and tap the aluminum piece away from the hood.
use a rubber sanding block cut in half for flexibility, and recontour the area. add resin coats as necessary to sanded areas.
use topcoat sanding resin for a final surface. Prime and paint.
IMHO, if its very big at all, I would get a good used hood. C4 hoods are pretty cheap. The corner would be easy to re-damage just by opening and closing the hood. You didnt mention how much broke off?
I had this problem on my '87 which I just painted. I asked the local college auto body instructor what to do and this is what I did. You can fix this with a little fiberglass and some time. Find the actual break in the fiberglass then use a small grinding tool to V out the crack to about 1 inch and a half wide then support the break back to the correct position. Cut thin strips of fiberglass and start laying them in. I was able to make the repair without any filler.
Coupe guy. The question was "How would a shop fix this" . I guarentee no shop woud do this type of hillbilly repair you are talking about.
Fiberglass cloth and resin?
20 years repairing fiberglass, Corvettes, motorhomes, boats, Peterbilts,
and except for the aluminium thats the way that I'd do it.
The right materials can be found for that type of repair.
Yeah, I was under the impression that the epoxy make a stronger bond then the SMC panel themselves, with proper prep and application. The whole panel is just glued together fibers coated in epoxy anyway, and we know GM used the cheapest material they could buy when they made it originally. The attachment epoxy bonds stronger then the original filler epoxy. Any should be a good learning task, at least it is easy to get to front and behind.
Evercoat makes a good SMC fiberglass resin. It can be found at http://www.eastwoodco.com
I've used some Eckler's stuff before, but found the Evercoat resin to be superior for me.