I'm working on some PVC-frame props for the front yard this fall - maybe a gravedigger and cauldron creep. I'd like to leave them up all month during October, but I'm in central Iowa, so the weather is unpredictable. Any suggestions for waterproofing their clothing? I read that clear spray paint will do the trick, but I don't want the clothing to be too stiff. It's not the end of the world if they get wet, but I don't want to be growing mold or have them too waterlogged.