Last night and today I worked on putting my own design on cups and saucers. After painting them, they went in the oven to harden the paint, and allow them to be dishwasher safe. I did test the dishwasher, and the design stays put. I would still recommend hand-washing to prolong the life of the design.
I also opened an Etsy shop and posted these sets for sale. Local delivery can be arranged if you are in the Kaiserslautern area.