Anthony Brown

Been there... Another vote for 100 percent cotton at 300 gsm or higher for true wet-on-wet. Cold press takes floods without the paper turning to waves, especially if the pad is gummed on one edge so you can pull a clean sheet. If I know I will stack layers, I mist the back lightly and tape the margins to a board while it dries. Keeps it flat. Then tear out when you are done and the edge stays neat.