When I did mine used jb weld, the long cure stuff. The grey color blended in very nicely from the end view. I would put a thin line on the grips lay it down, scrape of the excess that squirted out and then lift off the track clean the excess off better with some alcohol and then put the grips down again, repeat a few times until no more glue seeps out the sides. Then I let it solidify for an hour and a half or so, then use guitar cam clamps with cork inserts to tighten down the grips and I use a shaved down toothpick to clean any excess glue. Repeat 6 or 7 times and I was done.