Facial hair can also enhance your Scandinavian appearance. Of course you have to wear the right clothes aswell. For an upper garment we recommend a heavy metal T-shirt. Pick the least popular 80's rock band you can think of and go charity shopping to find it. Prog Rock makes another good choice, europeans probably like Rush and Yes.
Accessories are also important.
There's nothing more comical than an weird pair of trousers. Another option would be those snow-washed jeans that people wore for about 3 months in the 80s before everybody realised they were totally rank. Now you need to work on your bizarre foreign habits. This is the best bit, and pretty much anything goes. The rule here is that each of you pick any rules you like, but both of you have to stick to them.