Here I have it all sanded down & the bad metal cut out. There was a lot of dirt & scale in side that I was able to use a vacumn & a coat hanger bent to form a scraper to help loosen it. Looked like I got it all. Took a pick of that before & after, but those pic's apparently didn't come out. I then sprayed a rust inhibitor/converter (Permatex product) to protected it. Now my thinking is to buy a panel flanger to form a flange that the patch can fit into. My welding is poor still although I have been practcing & getting better. I'm thinking about using a metal bonding adhesive also. I see there are 2 types of flangers. A simple pliers type similar to vise grips & a pneumatic type. Can anyone share some opinions on these.