Using Isopropanol, or Ethanol (If you can get 100% the better, but I'm lucky I work in a chemistry lab) will get old marker stains off of the mat. Might take a couple of uses, but it worked for me. About the mat, it's absolutely great! Great for wilderness battles, and large carvernous spaces, and delapidated ruins.

  -- By Lars Hoek from Stockholm, Sweden on October 07, 2008

I love this mat, it's worth every dime. One problem, if you're lazy about clean up or needto save your map til the next week because it's a complicated draw, get a clear overlay sheet of plastic to put overtop of this to to actually draw your map on. If you let the wet erase markers set on the vinyl for a week it tends to set into the vinyl and stain. Learned the hard way. Still worth every dime though. and can cover a large kitchen table.

  -- By sgtrocknroll from akron, oh on August 31, 2008