I found at Napa they sell a mixing board that has tear offs that I found works real well. After the mix and application let the mess sit and just toss in the can. I think about 50 or so sheets with a board, and spreader, around 20 bucks.

I was using glass for a while and just got tired of all the cleaning. Was working on a large project, the tear off thing really saved time and agravation...

At first I was giving the counter guy the bad eye cause I thought it was one of those ronco 19.95 deals , but after a try I thanked him. They are a nice time and mess saver, and no I do not get residuals for selling these things, but sure recommend em.