I pulled the mold off tonight and trimmed the edges. I can't remember if I put on six or seven layers, but the mold feels very durable. Despite washing the rock in the kitchen sink with detergent and warm water before I started, you can see dirt that attached to the mold. The mold separated from the rock easily and looks like it caught all of the detail of the rock.
I made a double batch of hydrocal, only to realize I hadn't added enough of the hydrocal powder to the water as I poured it into the mold. I added in another cup of the powder and mixed it in inside the mold. To add to the excitement, my hydrocal powder was opened almost a year ago and was kept in a plastic bucket with a lid on it. We'll have to wait until tomorrow night to see how disastrous the results will be, lol.
