you use sunscreen
Use rubbing scholar or nail polish remover.
Well, one theory is that the chemicals contained in the whiteboard marker somehow reacts to the permanent marker, making it rub off, but it is not an excellent way to clean off permanent marker.
I have found nothing to get permanent marker off of anything. That is why it is called permanent. It stays.
Not coming off
hHir spray works good on any surface with permanent marker on it.
I would try fingernail polish remover. That will take permanent marker off of almost anything.
to get permanent marker off my backpack is nail polish remover or it will just faid away eventually
bleach or hard scrubbing um, try this, put dry erase marker on top of the permanent marker and erase it with a tissue
try rubbing it off with another eraser, that usually works with plastic and might work for this case too.
A permanent marker was used to stay forever, but they don't. A regular marker is easy to wash off and doesn't stay for a very long time.
a black permanent marker by the brand sharpie that produce the best permanent markers in the world
The solvent for permanent marker is denatured alcohol (hardware store). But it will also require plenty of elbow grease.