That's a lovely little building and a very useful guide. I haven't seen people use corrugated cardboard stuck together like that for buildings, but it seems very effective and cheap!
What are the rivets on the door made from?
Cheers
Kieran
I usually use sliveres of plastic rod, just cut dozens of thisn sliveres and apply them with superglue (I pour some superglue on to a scrap of card then apply dots of superglue to the model. I pick up individual slivers with the point of a scalpel and hey presto - rivets nails done).
You can also add square headed rivets or hand made nails using the same technique - just slice small flat squares of plastic card and apply in the same way.
In this particular model I sliced individual curved headed rivets from an Airfix construction toy and applied them in the same way - detailed above.
I hope that this helps.
Tony