Finally decided that I can't stand the faux gas cap anymore and went with a RTR panel. The fit and finish is outstanding and I should have done that a long time ago.
FWIW, the wart definitely wasn't round. After cutting it with a 5" hole saw, I have to trim off the rest of the wart with a Dremel and a cutting disk. The rest of the install was a simply peel and stick.
Finally wart free!
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