After making sure the paperclay was thoroughly dry and gaps filled in, I started painting the stonework foundation by giving it several dirty gray water washes.
The wash is mostly water with two drops of hippo gray and one drop of black. I went over the stone work three or four times with this, letting it dry between washes. Gradually building up a base of very light gray.
Next I started painting in colors, keeping the paint very watery.
I used Burnt Umber, Hippo Gray, with a touch of Black Green. I later added a color called Latte (which looks like very milky coffee).
I added the colors one at a time: First wetting the brush, dabbing in paint, wetting brush again, dabbing off excess on waxed paper, and then applying that color to individual stones, choosing them at random. I didn’t so much carefully paint each stone as simply dab dab dab with the brush (sometimes more like smoosh smoosh smoosh).
If any one stone color seemed too dark, I’d rinse the brush and use the dirty water to tone it down.
I did a lot of trial and error, wiping off with a paper towel before it dried if I really didn’t like the result.
I went over the stones I’d say four or five times until I liked the look. I still might go back over them and smooth out the colors, making sure none of the white shows through.
It was fun to experiment. The house is taking on a rustic, old-world feel, but that’s fine as I’m doing an antique shop.
Now that the foundation is done and the porch is finished, the rest is going pretty quickly and easily. Next, the bay trim and balconies, then it’s time for the roof.