Instead of wasting acrylic paint when cleaning brushes or palettes, why not recycle it into fodder for fabric collage? I came across this idea months ago somewhere in the blogosphere... can’t recall where now (sorry!) Since that day I stopped using paper towels and instead use rectangles of white cotton fabric to sop up excess paint in whatever form. In addition to wiping brushes, unused paint left on the palette at the end of a painting session can be stroked on either randomly... ...or in a more purposeful arrangement (below left.) The resulting fabric has interesting marks and color combinations that are great to work with. Depending on the colors, the rag could be transformed into fallen leaves, swirls of water, tree bark, stones... the possibilities are endless!
Happy painting and collaging!