the fenders on my 9N were original. Because of that, I decided to work with them as best I could and save them. Outside of the dents, gouges and dings there was rust along the brackets, and the rust was pitted through to the other side of the skins. There was a line of rust hole following the brackets. I sandblasted the fenders, then I dipped the entire fender and bracket into phosphoric acid for a couple days to eat away the real thin spots along the rust holes (placed into a plastic kiddy poo with about 7 gallons of concrete etching solution). I then power washed them along the brackets removing anything caught in there. Then it was filling the holes with epoxy, smoothing, sanding and priming numerous times. Then they were shot with topcoat and then clearcoated. I have to say, they look really nice. But on the interior of the skin I layed on POR 15 and poured it into and along the brackets so that they were coated...both the skin and bracket. While the POR 15 was tacky I then shot the interior with the 9N grey topcoat. I suspect it will take a lot for any moisture or rust to come through those skins and along the bracket. I didn't remove the skins from the bracket. But now when I look back at it, it woul have been easier to buy replacement skins and bolt and rivet them on to the bracket as suggested below.
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