PontiacBonnevilleClub.com

Re the Bondo, is it really as bad some have said on here? I know someone who bondo'd up there 70's Nova with quite a bit more than 1/4" thick and after 18 years its still held up fine.

Last winter someone hit my rear quarterpanel with his pickup in an intersection, and I knocked out the dents and filled it with bondo and it came out ok. I did use screening though which if you did your door with bondo I would recommend using.

The problem with Bondo is that it doesn't stand up well on rusted metal. Something like long-strand fiberglass filler works much better.

Converting all the rust available and then covering the affected area typically works better. The best way is to rebuild the area with new metal if possible.

I used "rust-mort" on the rust areas then temporarily covered it until I can replace or repair.

LeSabre in Buffalo wrote:The problem with Bondo is that it doesn't stand up well on rusted metal. Something like long-strand fiberglass filler works much better.

Converting all the rust available and then covering the affected area typically works better. The best way is to rebuild the area with new metal if possible.

Oh ok, in my case I had no rust and sanded down the area to bare metal, then primed and used the bondo. I figured having a body shop cut the whole quarter panel out and reweld a new one and paint would cost over $2000 as I had to have this done years ago on my 80 Cutlass and the cost was around 2300(insurance paid for it that time).

Bondo on bare metal and properly top-coated is a completely different kettle of fish than Bondo over rust. Bondo on clean metal is great. Bondo over rust is making a bigger problem down the road...