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Originally Posted by t walgamuth
spot could be from an accident repair. it is impossible to duplicate the factory prep and so often rust results from repairs. they will particularly show up at edges and ridges where the power sanders will concentrate the sanding and take it down to bare metal.
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I can sure relate to this. I've done some cheap rust repairs on the van. Sanded down to bare metal, light fill the surfact pitting with Bondo, prime and paint. Not for show........simply to stop the rust.
Two years later, rust appears in the exact same area. My feeling is that the rust remained inside the steel and it's impossible to completely remove it once the pitting has occurred.
If there are any tricks that I'm missing, please advise. I constantly chase rust on this van..........and I'm losing the battle.