I'm starting another painting, this one is for me, is much larger, 30x44. Found an interesting tool for flattening my collage elements, a shower squeegee. After drying I then lightly coated collage with a matte spray to tame them some.
this painting is propped from the bottom so it is fairly flat and hangs off my drawing table at least a foot
upright to make sure it looks okay, so far I'm good