After receiving some advice, I have decided to have the final image stenciled by a professional and not do it myself. It'll cost a bit to do but I won't charge anything more for the mugs and the final outcome will be better than my attempts. I am pretty good with photoshop but nothing compared to a professional who will end up making a better final version. Until then I'll make some quick and dirty stencils to chose from. Like this I should have emails sent out by Saturday.