Smart way to do things?!!!
No sir. Fiberglassing metal is the DUMBEST way to do things. Always. In every situation. There is no situation where using fiberglass to repair metal is appropriate. Fiberglassing metal is a cheap hack.
I have personally had to remove fiberglass "repairs" literally dozens of times. In ALL of those situations, the car would have been better off if the person adding the fiberglass had done NOTHING at all. It would have been better if they'd just walked away.
In your example, if you're too lazy or incompetent to remove the undercoating back a few inches from the area to be repaired so it can be welded up, don't touch it. Period. Welding on sheet metal doesn't take a ton of heat, do it slow and do it right. I don't insist on lead, I didn't say body filler has no place in bodywork. I just said fiberglass on metal is what shade tree hacks do. And it is. Period. If you can't scrape back a few inches of undercoating and weld in a patch, don't touch it.
You're not talking to a guy that drives a car that's had a 40k restoration and sits in the garage 99% of the time. You're talking to a guy that spends most of the year driving a '74 Duster that wears at least 4 different colors of paint, primer, and some rust. It's been cloned over to a '71 Demon with wrecking yard parts, craigslist parts, eBay parts, you name it. It's got home made chassis stiffening, it's got ground down welds that were rattle can'd over that you can still see because I haven't finished the bodywork yet. I've done ALL the work myself, and a good portion of it was in my backyard, not even in a proper garage. My MIG and TIG welders are both off of craigslist and they're both older than I am. And I will be the first to tell you my car isn't pretty- it's not some show car. But it's solid and it works and the work I've done hasn't made the next repair worse.
And I am still telling you, fiberglass on metal is a complete abomination. It may be the ONLY thing I could find on a car that would make me just walk away, and that has been a hard learned lesson.
Sorry for the derailment, hopefully the OP doesn't find any fiberglass on that Barracuda where it doesn't belong.
I think people can preserve a car , in most cases without a welder , and without sticking more money in the car than it is worth. A do-it-yourselfer that will always have other priorities and responsibilities, such as a wife/husband and kids for example, does not have to let their car deteriate because it would cost 40 thousand to do it the " right " way. They can get it looking nice and drive it for many years or they can watch it rot away because they took the advice of someone that thinks there is only one way that is worthy of their time and money.


















