Removing Black Weatherstrip Marks From Rear Door Jams?

[mtbmtb01]

removing black weatherstrip marks from rear door jams?

2007 lexus es 350
has black marks on the plastic light gray interior panels at the door jam over the rear wheel. looks like it might be caused from the weatherstrip. I've seen this noted on other cars for sale so it seems it may be a common problem. I tried purple power and wd40 but didn't seem to do little good.
I searched, but nothing I put in came up.
any suggestions for removal?
at least you don't see it with the door closed only when you open it to get in.

[herknav]

Mike, if you haven't solved your prob yet, give Mr Clean Magic Eraser a try. I've got a cream interior and have used the product for weather strip marks and shoe marks as well. Don't get too vigorous as the product is abrasive.