The pads were made with a pea gravel mix and over the years has resulted in pea gravel being exposed. It's like ice when wet. I don't think washing them would help. I'm looking for a semi-permanent fix.
I'll look into the non-skid paint. It would definately need a bunch of grit and texture to work in this instance.
Played at Fontana Village on the rubber track stuff that Innova put down. It was definately grippy, but also very cushioned. I liked it, but not sure what it would do to your knees after many rounds.