Important note - many may not know this, but you can erase sharpie on a dry erase board with a dry erase marker - you just color over it and erase like normal. I drew a massive penis on a buddy’s desk white board (this was before Covid when we were in an IT office setting) in sharpie, and then finished the drawing by turning it into a cat with a similar black dry erase marker. At some point he erased the cat, only to be left with a big hog leg he couldn’t erase due to it being sharpie. He freaked out for a bit before I helped him erase it.