I'd suggest "playing" with the surface of the Kong. It is a solid particle and much better at oil or slick surfaces. Try taking any shine off it with a Scotch Brite light grey (800 grit US) nylon pad or a P2000 grit Siaair or Abralon pad. That should handle a good deal of oil, unless you have high ball pseed and/or low revs. There is no data on your release/delivery in your profile, so I can't make any better sugegstion.
The Big-R-Bang & the Buzz are pearls. They are just too good on dry and lighter oils to sand, in my opinion.
The Black Pearl is a particle pearl and can handle more oil with more surface. I'd suggest less polish or even a 4000 grit Abralon or Siaair surface IF YOU HAVE YOUR OWN SPINNER so that you can restore it, if so needed.
I agree with Strider: 500 abralon is ridiculous on the BRB. WAY, WAY too rough. Not sure how it reacts to such a rough surface, anyway.
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"None are so blind as those who will not see."