i have a question. when i bought my car it came with a little rust hole in the rear left quarter and was wounder what is the best way to repair it ? i would like to weld in new material but i'm not to confident that i could do it with out warping the side. i know a lot of body shops would just bondo it over but would like to get all your opinions before i go into it. i was not to sure if this was the right spot to post this.

Even if you tried to weld up a small rust spot you would have to cut off a considerable section of the surrounding rust and metal to even work with. Then have to actually weld it on, then you would have to grind it all down... then have to end up using bondo anyway to make it all look smooth...

I would go with a bondo solution on this, make sure all the rust is dead before bondo'ing and painting though. Just because you sand/cut/grind the rust all away doesnt necessarily mean its dead, get a rust killer after sanding it all down.

It also not a very cricital safety area of the car and plus bondo is a pretty sturdy stuff. But if the inside of the quarter panel is going to be exposed to rain and road crap then you should probably protect it with one of those underbody rubber undercoating sprays just to make sure it retains its shape.

well the hole is about 1 inch long by .5 inch high

The hole is fairly small then so go bondo but make sure all you see is bare metal and not even a spek of rust otherwise it might crack/shrink/fall out.. anyways after you bondo primer the front and back and on the back hit it with some undercoating so it dont rust from behind.

welding heat and paint dont mix either

By any chance is it centered over the rear wheel?

Mine'* coming through from the back and underneath on both sides right there, and I've seen other Bonnies going in the same places. Factory did a really bad seam finish there.

Like I said, when removing the rust make sure you kill the rust, either with a primer that is specific to that purpose or you can buy the chemical itself.

The rougher, the better on the sanding. I use 36 grit for plastic or fiberglass adhesion.

Save yourself a headache down the road, cut that crap out.

yes it is right above the rear wheel its a bad spot for the salty water to build up if u winter drive your car me am trying not to drive if for a while in the winter till i get a transam or corvette