[joedoh]

depends on what you want. its not hard to pattern a new patch in there but it will be time consuming and can warp. If you are sure you can get all the oil and rust and corrosion out of there you could try some kitty hair.

I wouldnt personally weld over welds to fill it, as soon as you think you have it clean and put some filler on it you will find all the pinholes and junk in the welds and the filler will unstick.

if it were mine I would cut it out and weld a new, larger patch. two bad patches wont ever make a good one, and I would be sure of my welds instead of counting on someone elses.