hello again, gonna try and tackle my massive rust hole on the left rear fender.
the rust out here is very large. approx 1 and 1/2 feet long and about 4 inches high,creeping up the rear 1/4 panel. this car is too far gone to do a entire body restore on it. What my plan is, is to just fix some smaller rust spots, and of course this large one. i just want it to basically pass a provincial
inspection,it does not have to be perfect,but at the same time i want to do the best,and also fastest/easiest job.
My question is this: what would be the easiest and fastest way to do this?
i have bridged some large gaps before with fiberglass but i think this one would need some form of backing before the cloth would be layed down.
like i said,you would hardly ever see it.what would be the fastest way to fix this? need some advice on some magic cure or something that i can place in there to form a base and then either fiberglass or bondo it?

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1980 mercedes euro 300D 232000 miles(died,now parts car)
2004 2500 ram cummins diesel
1980 harley shovelhead
1988 anniversery corvette zr1(engine)
1978 240D 4spd 240000 miles (new benz toy)
1946 Cessna 140, Continental 0-200