A rocky start
LENGTHY POST ALERT
Well, having finished the basic landform, it was time to move on to the fun part of making it look like ground. I've decided to work on the right side of the hill first - it has nearer-to-vertical surfaces conducive to making rock outcrops and I'm in the mood to make rocks, plus it faces away from my workdesk, so I don't have to constantly stare at it in case I booger it all up. I prefer putting the rockwork in first and building up the group goop around them - makes a more natural-looking terrain than looking like a rock shoved into the wet ground.
I have a nice set of Woodland Scenics rock molds that I picked up new in the package a few years ago for $7.50 at an estate auction. My castings are plaster of paris, because I have about half of a large bag of it sitting in the basement. Total cost for this phase: zero. Perfect.
I used way too much water in my first batch of rock castings. They took forever to harden adequately, and what got pulled from the mold was ultra lightweight, chalky, and wholly unsuitable for anything. Strike one.
For the next batch, I got the crazy idea of using a 2:1 plaster-to-water ratio, which incredibly worked much better. When the plaster began to crack a little when the mold was flexed (which happens relatively quickly), I moistened the hillside and pressed the mold into place, holding it in place to ensure a good bond. After several minutes, I let go of the mold to move on to the next one, allowing the mold to immediately fall off of the hill. Multiple such attempts resulted in one small rock bonded to the hill and several hardened rocks lying about.
So, I sought other means of securing the hard castings to the plaster cloth. I wet both the back of the rock and the hillside, buttered the back of the rock with wet plaster, and pressed it into place, holding it there until the plaster hardened. This resulted in a rock casting lying at the bottom of the hill and a rapidly setting glob of plaster on the hillside. (Insert colorful metaphor here) Surveying the situation, and recalling Youtube videos of guys carving their own rocks, I determined to make lemons into lemonade and carve the glob into rock. After a few minutes of carving with a putty knife and utility knife, I have a hillside that looked like, well, carved-up plaster. Apparently sculpture isn't my long suit.
Having thus far failed to yet make a rock outcropping, I sought other attachment methods. Hot glue? Fail. Good ol' Elmers glue? Fail. As a last resort, I headed to the big box hardware store and coughed up $1.69 for a tube of PL200 adhesive for my caulk gun. Spread a few beads on the back of the castings, pressed into place, and got a rock-solid (har!) attachment.
Then came the real adventure: coloring the rocks. The problem is that I'm colorblind across a spectrum of earthy-tone colors, so I'm literally flying blind here. All of my layout's rocks are gray, which suffices, but I wanted something a little more earthy for these. I have a desk drawer full of the cheapie craft paint bottles that you can get at various store for 80 cents to a dollar each. Again recalling Youtube videos I'd seen on the subject, I pulled bottles of tan, burnt umber, and black, stirring some of each into a small cup of water. Applying these washes to the rocks, I got what I'd have to call just really dark rocks. The black was, intended to setting in recesses, instead just made the rocks different shades of black. I tried drybrushing on some of the tan and then white to lighten it up, but just ended up with blackish rocks with tan splotches. Fail. More colorful metaphors as I ripped the black-and-tan abominations from the hill. Strike two.
With a disturbingly growing junk pile, a third set of rocks were cast, with extras to be used as disposable test subjects. From the paint drawer I pulled a bottle of dark grey and one labeled nutmeg brown. In trials, I squirted some grey on a foam plate with some water, mixing them with my foam brush to make a stronger wash applied as a base coat tot he rock casting. This was followed by a slightly thinner wash of the brown. Another wash of alcohol with india ink and white drybrushed highlights, and I got this sort of undefined rocky-looking color that looked suitable to my limited perception.
Ultimately I think the rocks ended up pretty much the way I had envisioned. It came at the expense of lots of frustration, a trip to the store, and a disproportionately large amount of wasted time and plaster, but I'm now loaded for bear for the next time I make an area that needs rocks.
Next: Gooping it up