I just bought this really old floor goban:
http://baduk.blogsite.org/wp/?page_id=556
Does anybody have any tips on how to restore the playing surface? The lines are very hard to see. The whole surface got much darker than it was originally, I'm sure. I wonder if I should try to plane it (deeper cut and more dangerous) or just use sand-paper (a power tool might be necessary to make sure it comes out uniform). I would of course have to redo the lines afterwords somehow.
Also, has anybody ever tried to clean really old shell stones? As you can see there is some orange residue on them.
Thanks!
Pete