For years now I have been using a roll of toilet paper, with a paper towel wrapped around it that I change from time to time, as a blotter for my watercolor brushes. You are using just one or two pieces of paper towel that you wrap around the toilet paper and turn the toilet paper roll as you use it, instead of using paper towel after paper towel. This is a much more economical use of paper towel and a green solution for wiping your wet brushes.
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