I leave my Ranger craft mat on my work space at all times because I'm a messy scrapper, and it saves my table top.  It's heat resistant, so I can leave it on my work surface to heat emboss, and it cleans up easily.  Acrylic paint, glue, ink, gel medium, you name it wipes right off with ease.  I thought I would put it to the ultimate test.  As I was frantically preparing class samples for Kickoff, I made a ginormous mess on my mat.  It was covered in acrylic paint, glaze, gel medium, distress ink, crackle paint, and Stazon.  It's been sitting for almost 2 months (I said I was messy).  I had no idea if it was ever going to come clean or if I would have to toss it and buy another one, not that I would complain if I did have to throw it out because I've gotten months of heavy use out of it.  Well, it took a little scrubbing with warm soapy water, instead of the normal damp towel wipe down, but it came right off.  I would guess it took about 5 minutes to get it sparkly clean again.  Here's the before and after: