The black pads are held down by double sticky 3M tape. They are NOT rubber. It's some sort of cheap plastic material. It will Never get any better than what you have Now. It's only a matter of time until the white re-appears. It's the Nature of the beast. Don't forget that in the auto industry since the early '70's, Nothing has Squeeked or Rattled.... it just goes "cheap, cheap, cheap"... !!! It's plastic... It can be dyed, but, sooner or later the White will... prevail ! I'll be removing ours and scrapping them soon. Still looking for a solution to replacing the Silver paint and black runner. Have some ideas, but still doing the pro/con thing right now. Maybe more later on... Others have tried in the past, powdered cleansers, hyd fluid, bleach, dish soap, oils, dyes, "as seen on TV stuff, abrasives, polishes, and the whole 90yds.... Instant gratification... No Joy... Please post if you find something that works. We Love to Learn, too....
I've shares some of the Negative and have a couple of ideas in the "works". Please Share....