After a couple of days the ceramic paint is still a bit sticky. I guess it is mandatory to burn the paint in. Since that it would be unwise to put the lightwedge into the oven at 170°C I have to start over with a different sort of paint.
The lady at the arts and crafts recommended acrylic paint. I am unsure about this though. If anything goes awry, which is not that unlikely considering my poor painting talents, I would need chemical thinner to remove the paint. But that would most probably destroy the plexiglass as well.
