1, Get an A3 piece of white card (bought for 99p from a stationary shop in town)
2, Mark your grid in permanent marker and leave to dry
3, Cover with Cover Clear (again from stationary shop for £1.29. This is the stuff you use for covering books when you were at school) leaving an overhang on all sides
4, Make a slit from each corner outwards on the cover clear55
5, Fold the overhangs over the card edges
6, Mark your grid in permanent marker and leave to dry
7, when you use your new, state of the art battlemat, just use dry wipe pens to draw your paths etc
8, Just wipe clean with a damp cloth
Don't do it on the floor like it did, you get bits all over the place.
Have some wet wipes handy, great for getting rid of any mistakes you've made
How about that then?