How do you get the black marks off your white rub rail?

I think Acetone ....someone will chime in ....but ONLY on the rubrail ....

thats what i use also.

wipe on and off? I tried thinner and it didn't work.

just put some acetone on a clean rag and drag it across with some elbow grease. may have to go over it serveral times if its really marked up. it evaporates pretty fast.

S.O.S. pad only on the rail though be careful works great

Used the acetone on my old rubrail insert with fair results. Don't soak the rag, just damp, then work fast. Soaking it will make the insert soft. Try to keep off the molding. But I did use a rag at times heavy with acetone to rub out scratches in the molding. It softens the plastic enough that you can rub across the scratches until it 'melts' smooth. I did notice that the insert got dirtier faster and easier and lost the shine after using acetone. Ended up replacing the insert with a new one and no longer use acetone. Black streak remover or bleach white only now.

my rub rail is one piece hard rubber.

acetone

What happens if you get acetone on gel coat???