Just take some odd ships from your existing sets and give them a rust n’ duct-tape texture
Here is an infantry pick.
[img]http://av.rds.yahoo.com/_ylt=AskViAH0l.M7AKATUVlI3qaHBqMX;_ylu=X3oDMTBwanI ybjRqBHBndANhdHdfaW1nX3Jlc3VsdARzZWMDc3I-/SIG=12ee6pqe4/**http%3a//www.boomersfunnies.com/Pictures/Redneck%2520special%2520forces.jpg[/img]