I have a client that want a buch of 2in1 business card/brochure holders in need of graphics. The tricky thing about it is obviously the depth of the cups will rob the film from filling in behind the next. Not a big deal so long as they don't run out of cards to hide the void. The holders are clear plastic and flat from top to bottom on the back, which would make for an easy dip, IF, it were possible to dip them first, rinse thoroughly, and then paint the base color. The film of choice in prarie ghost (sage brush with that horrible celery green base color). Is this possible, to dip over a clear substrate, and then paint?