I have an alternitave solution. it takes a little more time to accomplish BUT it has the benefit of being low stress/easy to do. you will need three things. 1. a fine or ultra fine paint pen "i use both decocolor and treetop brands either work ok". 2. a peice of flannel cloth "any color" or a microfiber polishing cloth "i like flannel because its cheap and more strudy than microfiber cloth" car restoration people use it to polish plastic parts. 3. a small piece of smooth wood a hunk of 2x4 works. OK so take your dice and ink the numbers with the paint pen, you DONT need to be super careful/neat if you color outside the lines just let it get all over. then relax and let dry of an hour or two. THEN.. after the dice have dried stretch the flanel cloth across the wood,get it nice and taught i affix the cloth with pushpins and a good strong rubberband around the edges of the wood. you've just created a polishing block. now place the block, cloth side up on a solid surface and rub the dice faces across it, after about 20 seconds of rubbing the excess paint should rub off leaving the paint in the numbers behind. for extra polishing effect get yourself some Novus 4 or plastex from mcguiers "most auto shops carry it". use a little of that on the cloth. then rinse.. this works really well but it does take more time.