I finally got rid of the deteriorating rubber on my swim deck. As people would walk from the swim deck to the white vinyl sun pad, their feet would leave black rubber footprints from the rubber coming off on their feet.
I replaced it with a pad from Sea Dek. Removing the old pad took a lot of acetone and even more elbow grease. Once it was clean I cut off the oxidization so that everything was shiny black. I'm thrilled with the results.