ABS for painting substrate
tollowing up to my comment at the end of critique - we were talking about wanting a smooth surface for larger pieces that wasn't unwieldy or textured like canvas. I was listening to a podcast (Undraped) with Stanka Kordic and she was bemoaning the same thing. The host Jeff Hein mentioned that he uses ABS, I think it was 1/4" thick, for his paintings. This is a manufactured plastic one can purchase in flat sheets at a home goods store like Home Depot or Menards. It comes in those giant sizes like a full sheet of plywood might. Jeff says he has seen these mounted together to create larger surfaces - he actually will mount his larger paintings (I think he said anything bigger than 18x24) onto gatorbord, and even larger ones will go/get mounted onto the pink insulation foam. Once they are framed, they remain relatively lightweight and the surface is stable (will not react to humidity levels or warp. I was going to try painting on a smaller piece to see how I liked it - a simple google search will give you the details on priming for waterbased or oil medias.