[FT] Using Sculpy to build ships with

Anyone out there have any pointers on using Sculpy to make ships and the
such 
with ? I just started to use this stuff to make bases for my Battletech
minis 
and it works great.
 What kind of longevity can I expect ? That is a big issue also.

Thanks,
Kirk

BSA Pack 23 & Troop 23 Rockmart/Aragon, Ga.
Mechanical Designer
Wargamer

"Who touches a boy by the Master's plan 
Is shaping the course of a future man, 
Is dealing with one who is living seed  
And may be a man whom the world will need. "