I have been casting and building with these molds for well over a year now. My main project is a huge castle layout (4'x6') and the component dungeon pieces were the perfect "quick" projects!

I use Plaster of Paris because it is cheap, holds good detail, and doesn't shrink if you don't make it too thin. I usually add a bit of hydraulic cement to firm it up, and to cure the plaster quicker. Water putty works well, too, but gives the bricks a warm tone, which is good for some applications but not cold, dank dungeons!

Here's a pic of filled molds, together with finished bricks. They are stored in cardboard boxes, which allows any moisture to evaporate as they sit.
	Here's a close-up of some unfinished pieces - including a bridge deck with a grating hole. As there is only 1/2" on either side, I should think it will require some creative thinking for characters to navigate this path! But they sure don't look like much before they're painted, do they?

This is the Dragon Skull Wall Section. It has been primed in a thick coat of cold grey. This coat has to dry well before the next stage, which is the dark wash.
	The dark wash seeps into the cracks, and stays in the depressions of the stone itself. After the dry-brushing, it will give the recesses between the stones a dark, shadowed look.

After the wash is dry (there's a contradiction in terms!), the pieces are dry-brushed with lighter grey or white or a combination of both. I have found that the skulls and feet need to be highlighted more than the stonework does.

Once the pieces are totally dry, they are sprayed with an acrylic matt sealer. I am trying to find one with a UV protector, to keep the colors from fading.