I had another friend ask me how I made curved patches where I didn't have a replacement panel for it. Its the same process for the seat mounts that I had to replicate, but in thinner metal.
Here's a play by play for small patch I did on Friday.
Here's what I started with.
I didn't quite like the amount detail that I'd be left fiddling with, so I cut out a bit more to make the patch a bit easier to fit/weld.
I start with a piece of cardstock just a bit bigger than the patch. (not that you guys don't know what a square piece of paper looks like)