"I could put big transparent letters across it but that defeats showing it." True, but I would hope those who look at it and "judge" it and offer tips on it would understand why the "letters" are there and "look past it" to the art itself. One thing is for sure (well, at least I think so), people wouldn't steal art that required excessive manipulation. Not only is it YOUR decision but the decision of every artist here who creates art worthy of sales (and therefore theft).