I'm quite confident that the
www.pimpyourcam.com artist could help you out if you wanted to spend 800 Euro and ship it to Germany. Another 600 Euro for lenses.
As an alternative or a do-it-yourself project, it should be quite easy to remove painted lettering. Any hobby shop should have decal and paint remover (be sure you get some that is safe for plastic however). It shouldn't be that difficult to file down any raised lettering you want to remove, although you would probably need to buff and airbrush the area where the lettering once was to get a nice, smooth surface. The indented "Canon" on the front might be the biggest challenge as I can't think of an easy way to fill the indentation. Might have to just live with a black-on-black Canon logo.
There are a lot of under $100 damaged or just plain old DSLRs on eBay. If you are serious, I'd get one of those to experiment on. You also might want to talk to an auto body shop and get their input. The Canon paint seems to have a bit of a texture to it that might be tricky to reproduce.
Why do it? Well, why do some people spend thousands to customize their cars?
I think those that worry about resale value are missing the point. On the other hand, I suspect that the nice custom jobs done by pimpyourcam could very well end up increasing the resale value since it turns the camera into a work of art.