So - I painted the canvas with paint I already had - since, as you can see, they are pre-printed for little kids to paint - so I needed to cover up the picture. I just laid the photo on and let it dry with the paint for a bit and then covered the whole thing with Mod Podge. I added the 3D stickers once it was dry.
I will have to touch up the paint some - I can see some of the pre-printed picture is showing through - or I may just add a little gold glitter! yea, that is an idea!