I am going to be watching this because I wish I had a good way to do this as well. I hate that chalk wipes offs... I use stencils with crayola fine tip washable markers, but get so tired of marking
the pounce is quick but wipes off and I had an experience where the blue pounce didn't wash completely out
I think my next attempt will be with crayola washable marks and stencils, but just mark smaller areas (instead of trying to mark the entire top at once) Hopefully I will have a little better time with that