Thanks much for the compliments. Andrew, I know the stuff you are talking about, I used it in a spare room I sheetrocked this past winter, and it is great to work with. I hadn't hought of it but think it would have the same problem as teh water putty. Jac, I had forgotten about those two part putties. A friend had brought soem over once, I think that may be just the thing. Last night I painted a heavy coat of acrylic paint on it, using its body to conceal the twisted wire. I think that may be sufficient, I'll be downstairs later to see how it holds up and add more.
I had mentioned a page or two back that the whole scene needed to be removable for access, here are some photos of the corner with the scen removed and the pieces added on by one. I'll post two angles of each step. The first shows a couple pieces of velcro on the backdrop, these hold one end of the Reardon Steel building. The building rests on a strip of wood which also is held by velcro, its supports are jsut out of sight behing that brown shelf, which supports the corridor, but doesn't cover the trackwork beneath. It also would be removable if I needed to actually replace a turnout. It is held by a number of screw which are accesable.