You could look into Belzona super metal 1001. VERY expensive, but is the best epoxy out there. $290 a kilo. They repair shaft keyways with it. I used it to seal hole in intake port. Stands up the best to alchol in pump gas

best of 11.24 at 119 mph 1.60 60’. 68 340 S Barracuda Fastback F.A.S.T [IMG]http://i67.tinypic.com/2mnnnnt.jpg[/IMG]