You could use sandpaper to reduce the sharp corners of your grips. And it is possible to RIT Dye G10, which most of these grips are made of. But you can't dye it any lighter than it started, only darker. Just today I used yellow dye to make my FDE grips more of a dark mustard color, which isn't what I was going for, but it's still an improvement.
Sent from my Pixel 3 using Tapatalk