Chosen Solution

I have a Wii I explicitly bought to use as a Component Gamecube, due to the cost of actual Gamecube component cables. I may use it for Wii games, but I also didn’t even use the one from 2007 for games most of the time and that was a shared Wii. The controllers work, but the grips have always been gone as long as I have owned them. I tolerate it, but now I think I’m going to use it enough to justify rebuilding the grips. I am looking at trying white Sugru or an epoxy stick and matte spray paint to fill this in best I can and make it look flush. Either way, I will need to sand it. Out of both of these materials, which one would be cheaper to use while still working as a filler? I don’t know what type of plastic they are (iconcepts game fury) but I know clone controllers enough to suspect ABS.

I use sugru to fill in small holes but this looks like a job for a clear epoxy plus it would be nice and smooth.