A question for the group. What causes bondo to bubble? Is it water that
gets into it after it cures or is it just the inherent nature of the
stuff to do that?. I was looking at a car that supposedly had a
professional, reputable rebuild 5 years ago. It had half a dozen bubbles
over each rear wheel well,each about the size of half a dime. Also had
one the size of a silver dollar behind the front wheel. Owner claims
that any bondo was just a "skim" and that all rotten metal was replaced.
What do you think?
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