i, like so many others, was delighted to hear that one can draw onto glazed ceramics with sharpies, which, after baking at 180 for half an hour, become permanent. they don't. which is awful! i spent ages on these:
i didn't put them through the dishwasher or anything, and they were left to dry, but white wine became orange in the octopus tea cup, the image now all but gone, and my doodle of russel's teapot was wiped away with the most gentle of sponges : ( fail! i didn't take pictures of the destroyed work, it was too depressing.