I went to my local art supply store, but they didn't have Sculptamold. They did have Celluclay in 5 lb bags, though. Nearly bought it, but for $20 I held off. Can anyone familiar with the relative advantages/disadvantages of each post their thoughts?
I've never used Celluclay, but have used a lot of Sculptamold. Sculptamold can neither be used to sculpt, nor to mold... so who picked THAT name?
I use plaster-soaked paper towels over crumpled newspaper for my scenery base, and use a lot of Sculptamold to smooth things out, to fill in the too-angular valleys, and to add ground undulations when things look too flat. A little bag goes a long way.
But there's no way you're ever gonna carve anything in it. It dries sort of like plastery cardboard.
Sculptamold is great stuff... but as Gerry said... it isn't actually used for molding Think of it as a "modeling mud"... apply it over a plaster gauze strip base to add contours... the next step is to "press-into-place" rock castings BEFORE the stuff dries... using the Sculptamold to surround and blend the rock castings into the surface of the contour that you are creating. I rely on the stuff and use it all over my layout... absolutely a "must-have" in my modeling world. It takes a long time to dry, so don't apply any color to it for several days.
IMO, Celluclay and Sculptamold are best used to create undulating ground and for patching small open areas/cracks where plaster just won't work as well or at all. Neither are soupy and both have a long working time. You can also combine both and make a stronger/reinforced mixture using the following "secret formula" found on page 73 of 6 HO RRs You can Build:
1 cup Sculptamold
1 cup Celluclay
1 / 3 cup white glue Mix and apply approximately 1/8" thick with an artist's pallette knife.