I tried several different things that I saw suggested here or on other sites, and a few things I just decided to try - Wd-40, lacquer thinner, gojo hand cleaner, mineral spirits, goof-off, and lighter fluid. While some help fade it some, none completely removed it. I had used acetone previously and have white spots on that countertop, where the acetone removed the sharpie, but also the color in the countertop itself. I did not try alcohol or the magic eraser. I did find something that completely removed the sharpie marks without fading or damaging the countertop - driveway and concrete cleaner/degreaser (Purple Power). It does have alcohol in it (butoxyenthanol), as well as sodium hydroxide and a couple other things, so I can't say for sure what did the trick.