Ok... those ideas make sense... the flash of rust happens almost immediately as I am washing off the metal prep...

Below is the same inner fender after re-applying metal prep and letting it dry on the metal...

I guess I will try to dilute some POR 15 with water then dry it fast... smile
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IMG_0998.jpg (513.22 KB, 165 downloads)


53 3100 purchased brand new by my wife's grandfather... full frame up restore in progress.