Does anyone have a good way to clean up licence plates? Soak them in something over the summer? I know we get more every year and some kids keep them as keepsakes but it would be nice to reuse the ones we have if we can.
600 grit wet and dry sandpaper?
Spray them with KILZ? That should hide Sharpie.
I’ve had really good luck wit the dry erase marker method on many surfaces - see the wiki link I haven’t tried on the plates since I use printed labels on out plates which are easy to remove with WD-40.