i've just taken them off and all of the foam sticky crap came off easy it's just i'm now left with a couple of blobs of this black rubbery stuff that doesn't seam to want to come off no matter what i use!

HELP!

Hi, my mate did exactly the same, he stuck his back on however have you tried a blow dryer and tried getting underneath the silicone?

Have you tried using polish or a tar remover of some kind? thats all i used when i wanted to get the stuff off left from when i debadged my car, or are the bump strips stuck on with something different