How to get black rubber marks off of white vinyl fencing

Try spraying with WD 40 allowing to sit for a few minutes then wipe clean!

Give the ”Magic Eraser “ a try ; Now I’m not a big proponent of expensive products but this item really surprises me when it comes to hard to get spots (particularly on light surfaces ) . Perhaps a generic brand would help - I find these kind of disintegrated A lot quicker than the original. Good luck .

( thinking ahead, I wonder if rubbing some Vaseline where the marks tend to be made- by the mower- would help avoid them next time.? )

Magic Eraser is just a very fine sand paper. I would use a good cleaner degreaser on the fence. Maybe power washer with detergent.

Have you tried a Magic Eraser?

rest a small spot with mineral spirits