If you decide to paint them, Canvasbacks are attracted to white so where ever you currently have white on the decoy paint it (flat) white it should be enough (Drakes Only) that will draw them in to the point they will see the hen decoys. I paint the heads on my Mallards every year again Drakes only and use Acrylic paint that I get at the hobby store. It is sold for model car building. I can't tell you how realistic it is If you are interested I can get you the make and color. Can't help with the Pintails