More work on the Amon Hen terrain - using the hot wire scroll table to cut the various stairs and other parts from foam:
I've added depron skin to the Parth Galen walls, and scribed tiling all around. Here's a test fitting with stair pieces:
A Dremel metal brush bit was used to make the parts look weather-beaten. The railings are still missing from the stairs, I will add them next. Note also the small bridge seen briefly in the movie. Here's a template I used for the bridge:
Here's the current status of the Seeing seat with the stairs cut and the walls glued.
The ground level is rising from right to left, and should be around where the scribed tiling ends. Here's also the weather-beaten top deck (still without the seats & eagles, though):
I should be able to glue both Parth Galen and Seeing Seat to mdf bases soon, and then I can start thinking more about the layout of the entire Amon Hen board.
But seriously, foam, foamboard and depron are rather durable, and with a coat of latex paint on top, they cannot be damaged by placing and moving minis on them. Only if you accidentally hit them with sharp objects - but then again, there's hardly any material that could withstand that without getting cracks and bumps. Foam terrain can certainly withstand acccidental dropping better than plaster casts, I assume. In any case, the damage is more likely to come from storage / transportation rather than gaming. So far my Balin's tomb has seen several battles, and it has withstood well. 
