[Tom Morookian]

Swiss cheese, more like the screen door too.

Here's a couple of fender patches I did. In some cases I found donor fenders that where "bad" in places mine where "good" and some that had the good/bad reversed.

Back up your welds with a piece of copper and your less likely to burn thru the swiss cheese. On most of my patches I put a 1" wide backer from under the old metal and the new.

If you leave pin holes they are going to rust thru eventually. Cut and paste patch panels wherever you can. Really rusty old metal requires that you treat the metal before painting. Some guys just use etching primer but I like Ospho as a rust converter and then an epoxy primer.

I fiberglassed the inside of all my fenders.