I tried using regular marker, as it mixes with itself of course. But it didnt change a thing. exactly as it was before. Even tried alcohol (knew better). That didnt work either.

I even had a can of flux remover which has isopropinol and acetone. That worked a tiny bit but still no dice.

Oh well. Sand paper it is. LOL.

Most likely the marker was written on back in 2000 or so when these things came out?