I have a series of images that were created for me by a visual designer. They are beautifully done, but consisted of layered shapes that do NOT have outlines. I would like to make coloring pages from these but because of all the layering I can't just select all, fill white and add a stroke. I have tried rasterizing and doing an image trace but I can't figure out settings that do this fairly cleanly. It seems illustrator doesn't do a great job at tracing former vector images, how ironic. Any ideas here would be appreciated.