Picked up this thread rather late.
I used a normal 2-part "Marine" epoxy (sold by, I think, Goop); with an epoxy colorant (Tap plastics has it in their fiberglassing supplies), Angle grind to smooth out the rough metal, then epoxy to build it up eyond original dimensions, and angle grind again to bring it back to close to original. Looks OK (repair is obvious if you look at it, but doesn't stand out), and has been on 2 weekend runs without any apparent detriment.
jky
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