Rustoration Heeeelp!

I don't mind removing what's needed to gain access. I just don't want to burn holes in my cowl trying to learn to weld!

You don't need a donor cowl for that flat piece of metal, just get some 20ga and cut back to fresh metal, and weld it in..

You put a piece of brass or aluminum behind where your welding so it doesn't blow through, which also acts as a heat-sink, tack welds only...