1. First I base coated everything in Country Grey (AppleBarrel).

2. I then used a black wash in areas that should have some shadow as well as around the peak lines plus some other random spots:

Black (Daler Rowney Acrylic Artist inks) - 20 drops
Matte Medium - 10ml
Water/Flow - 10ml (1ml flow, 9ml distilled water)

3. A yellow ochre and sap green wash were then applied to random areas on the roof (all recipes below are additionally watered down 1:1):

Yellow Ochre(Daler Rowney Acrylic Artist inks) - 20 drops
Matte Medium - 10ml
Water/Flow - 10ml (1ml flow, 9ml distilled water)

Sap Green(Daler Rowney Acrylic Artist inks) - 20 drops
Matte Medium - 10ml
Water/Flow - 10ml (1ml flow, 9ml distilled water)


4. After everything is dry, I then painted random slates various colored glazes listed below.
* Wedgewood green
* Denim Blue
* Burnt Umber
* Pewter Gray + black wash
The glaze recipe includes 1 drop of paint, water+flo-0aid, and Golden Glazing Liquid (Satin). The water+flow aid and the glazing liquid are added in approximately equal parts to fill up one section of the palette pictured in a previous post. The glaze has very little pigment and the glazing liquid helps distribute a semi-transparent layer of the color over the entire slate.

5. After the colors applied above had a chance to dry, a liberal sepia wash was applied to the whole roof to blend everything together.

Sepia Wash - 40 Drops Sepia(Daler Rowney Acrylic Artist inks), 10ml water+Flow, 10ml Matte Medium)

All washes are Les' Wash Recipe: http://www.dakkadakka.com...m/posts/list/261541.page

I'll likely follow the same painting scheme again for any future roofs, but would like to see how it would come out using a gray ink wash instead of the sepia. My guess is that it would mute the colors too much for my taste. It may, however, give a more 'cool' slate feel to the roof. In any case, that is a different experiment for a different day.