Deep space nine

There is no rust in space.....I'm building a 395 piece Imperial light cruiser. It's cardboard and sort of just fits together with a few glue joints. We got it for Christmas and me and the little guy have been working on it off and on for 6 months! He finds the pieces and punches them out and I try and fit them together. About 90% of the pieces are perfect fits, a few are not and 1 was not cut right. The cruiser as about 22" long!
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You are right on rust. But dirt from ships docking and what not .also we would love to see what the little feller and you are building post it up.