Rob, thanks for the response, I did not think of Bondo, was thinking of maybe JB Weld. Yes I was thinking of just filling in the pits, groves and fairing smooth. I don’t know if it would even make a difference. With regards to the bent up tubes. How are the tubes attached to the plate, are they rolled, soldered or braised? Have you seen this before and experienced no issues provided there is no leakage? There were no signs of leakage when I removed the core, slid right out just a little black.
Thanks for the response Tony. This might be a stupid question, should I try filling the corrosion and smoothing it out before I reinstall it? What about the core with the banged up tubes?