A Stone Barn Scratchbuild

[Sumpter250]

For the stone work I will be using a product called Durham's Water Putty. Some modelers have used this as a medium to construct roads, parking lots etc. It sets up fairly quickly and once hardened can be scribed, primed and painted easily (similar to hydrocal or other plasters).
I made a test wall the other day. I took a piece of cardstock and made a simple frame of stripwood. I mixed the water putty(3 parts powder to 1 part water.) I sprayed the mold with a little wet water and poured in the mixture. I let it sit for about an hour and it popped right out of the mold nicely. Scribing the stonework was easily accomplished with the point of a #11 blade. I then tried to see if the wall could be cut for windows or doors and found that it broke when I tried it. So for the proposed structure, the openings will need framed out in the mold. Matt

That breakage looks familiar ! One possible "cure"....after the putty sets, carefully drill out the center of the window opening, carefully enlarge the hole with a taper ream ( try to get right out to the inner edge of the proposed opening ) then use files to finish off the corners. If you haven't trashed the broken wall section, use it to try the technique.
Even Styrene sheet can fracture when trying to cut out window openings, I've used this method, and it seems to work very nicely. It can be time consuming, but then, changing the mold for each new wall would also be time consuming.
This will be an excellent project, and I can't wait to see how it turns out.
May your patience hold, and may fortune favor you.