Sandblasting... hmmm. That might actually work. Messy but would get into all those little pits and get them scrubbed out. I could then powerwash out the grit and prime/paint. I'll have to look into that.
BTW, I called a local boat painter and he said he would have to sand flat the molded in non-skid and then paint it with Interdex. Also said it would be major $$$ (of course
I liked this molded in nonskid when the boat was new but now it is a huge PITA!!!