What, more rust?

Since I don't have welding gas, I figured I'd cut out more metal. Why not? The bottom of the wheel well hump looked pretty rotten I was going to save that until later, but why wait? I have a cutting wheel ready and waiting. So I spent about an hour cutting out more questionable metal. 

I'm debating whether or not to use the wheel we patch I cut out of 22 gauge (I think). I have 16, but that's going to be murder to shape. I figure I can reinforce the 22 if need be. Assuming I don't burn through it when I weld it in.