Posted by Tim (IP: 205.188.197.54) on July 19, 1999 at 21:38:19:
In Reply to: Re: my understanding of it posted by Chris on July 18, 1999 at 16:14:04:
Unless you don't plan on keeping the car very long then get rid of the old bondo. The body shop will have to try and bondo over it and it simply won't last. Besides, if the body shop is the one putting the fresh bondo in, (or perhaps sheetmetal) all it will cost you to have it done right is a little sanding--well worth it.
: Yeah, makes sense...unfortunately, the job was pretty professional and all they did was fill in the grooves at the joint with some bondo (not a whole lot). The new paint will be catalyzed, maybe strong enough to hold the bondo down. What about the Bondo Jelly...i've used that before, it's a lot harder than regular bondo. How much does that crack?
: THanks for the help!
: : bondo does kinda crack with age, the metal it is attached to expands and contracts with the temperature fluctuations and after a few years, the bondo gives up the ghost. Bondo can't bend and stretch like the metal. Best thing to do is try to replace the bondo with steel, have someone weld it in right, but I can tell you its a pain in the ass to get it right without having the steel buckle.