Wayne and Dan
Thanks Jamie. They were running a special on that web page on closout colors. $10 bucks off a bag
"Is the track removeable (and salvageable) after the material has dried?"
Yes, very much so. Even though it dries extrremely hard and has good sound insulating properties, you can simply spray hot water to area you want remove. Assuming track scews are not there it will lift up with spatula. Rinse track under warm water and it will be like new. If you get material near throw bar , it can be wiped off with wet rag.
"I'd also be concerned about fine-tuning the track and turnouts, as the usual practice is to install the track, and use it for a while: "
Yes, and this brings me to part two. My layout has been an expansion from 2 four by eights to a main line of 252 ft. I used the traditional method for some of the track. Where there are sections I don't want to lift out I use the firbedecor along the outside edge of track. The ballast in center (between rails) is done in traditional fashion. The excess is pushed off the side (as normal for ballasting) into the fibredecor as one layer, saving lots of ballast. Ballasting 450 ft of track with an eye dropper was not my idea of fun.
"I like to build up the scenery applications in layers, to control both the texture and the colour. Can traditional scenery methods ("wet" water spray and dilute glue application) be used after the initial application using the Fibredecor?"
Yes you can use glue after material dries but that defeats the purpose of using fibredecor.
First you can achieve depth without glue. The idea with fibredecor is too avoid using glue as it often dimishes the colors. The scenery material is placed on fibredecor while it wet. So for example I may take some dark ground cover over the fibredecor, wet it , then add lighter color and wet it gentlay pressing it into the fibredecor. You need alot less material then traditional methods. If applied at a railroad tie height you can stick small bushes, tress directly into the material prior to drying. Sometimes its best to wait a day or two for it to setup if the piece is a bit large.
I like using Cray's custom scenery, woodland scenics, Scenic express, natural materials.
With respect to photos. I have submitted closeups descibing the procedure to magazine. About 95% of the scenery in the album was done using this method, including the cliffs.
http://www.flickr.com/photos/wsdimenna/collections/72157603222420889/