I just completed modeling the structural portion of the Starrucca Viaduct from Luan and wood(11 arches, not 17 like the original). Just wondering if I could purchase molds similar to the stonework used on this Railroading Icon? Are there any suggestions for applying thin stonework molds to the flat luan surface? I don’t want to use plaster because of the heavy weight. I’m thinking some kind of rubber, plastic, or paper mache. I’d like to form thin sheets from a mold and cut them and adhere the pieces to the arches. Any suggestions? Thank you very much.
I would think silicone would be one of the lightest materials you could use. As far as a mold for the arched stone goes, I think your on your own there. I know Bragdon industries makes molds for stone walls etc. but I have never seen anyone do arched stone work.
I’m facing a similar challenge in the future and am looking for ideas as well.
Perhaps building up the stonework on one section with individual balsa “stones”, then using it as a master for a latex mold to cast the other arches?
Jim
Most folks who’ve done this cast a section at a time and hand carve the detail. Not many shortcuts I’m afraid, but very rewarding nevertheless.
Check out CC Crow’s website: http://www.cccrow.com/main-pages/home-list.html
and
How to Articles: http://www.cccrow.com/main-pages/how-to.html
His work is beautifully meticulous. I have some of his kits.
I use to work in a professional model shop in New York years ago. We used modeling clay (hard mock up type) but the plastaline clay in most craft stores would work as well. You can cover a duplicate section of the arch with a thin layer of clay and model the stones, constantly changing if needed, until you have what you want. Then make a mold over it using latex or silicone rubber (silicone is expensive but give the best results). Probably a good idea to spray or brush on a light coat of mold release to keep the clay from sticking to the mold. After the mold is removed you can cast the stone section in a plastic molding compound available at some of the better hobby supply stores. This is a lot of work but once the mold is made you can make as many parts as you need. Just a thought on one way to accomplish the results you are looking for. Good luck.