I have a hole in my tire well what is the best way to patch it up for good?

grind or cut out all the rust.. make a patch panel....weld in the new patch panel...smooth out...paint the car

it should be known DO NOT bondo over the old rust

I have a hole there too...another project to do.

my buick had the same problem and so does my bonne and i just fixed it.

i sanded all the rust and got all the rust and coating i could get off and i bought a rust kiling primer and bought some underbody spray and i put 2 or 3 coats of underbody and to this day its holding up very good.

L27Buick what do you do when the hole is all the way through?

oo, i didnt have a hole in my bonne, my buick had a hole but it was that big so i bondo from the inside and then sprayed underbody on both sides. but im sure other people will have more info for a hole.

A possible fix for you guys would be to cut an old fender/wheel well area out..rivet into yours.. then underbody coating it to seal up. (if welder isn't available)

I just developed that same hole a couple months after I put 2 12" subs in my car....I figured I rattled the undercoating and rust out, but it sounds like it'* more common that I thought. I'd personally cut the rusted part out and weld in a new piece of steel, then spray with primer. Much better chance of preventing future rust.

my coating came off about 2 years ago. (before I had subs)

I think something punctured the coating on the road and then the metal began to rust. And it seperated the coating from the fender and continued to rust.