A really excellent piece of work, congratulations.  The Revell U-Boat is one I'm dying to build, but will be leaving it for a while...  Costs a lot (esp. with all the AM goodies I'd like to get as well), takes a lot of space, and will take a lot of time.  I'm finding finishing off my 1/72 corvette quite hard going now*, so a simpler kit will be next on the workbench (well, dining room table!)
On the subject of rust - I'm in the RN and even very well maintained ships are going to show a lot of rust, particularly in less accessible areas, after even a few weeks at sea
* Have been building her since Jan 04!   
