I definitely would never do something like that with a WW2 uniform in Germany. There is a law that forbids wearing Wehrmacht uniforms in public. It is probably allowed if it just for getting to an event, but I am sure you will be facing a lot of trouble.
What I really wanted to know, was if anyone did it in Europe and what the general responses were. I am mostly relying on public transport and I would like to know if anyone had any problems with doing that.
I had bad experience already, and all I did was carrying a bow and a small replica knife and arrows over the streets. The police basically stopped me and told me to hand them over the arrows... But that happened long ago, I maybe was 12 year old back then and by law I would not have been allowed to carry that knife.