This was painted on a half sheet of Waterford 300g cold press paper, using Yellow ochre light, Ultramarine finest, Cadmium red light, Permanent Carmine, Cadmium yellow medium, from Schmincke; Cerulean blue, Cobalt turquoise, from Winsor & Newton; Quinacridone Burnt Orange, from Da Vinci. The brushes I used were Rekab 320s Kazan squirrel mops, sizes 6 and 8, and Da Vinci Cosmotop Spin synthetic round, size 24.
Some participants were curious about the Rekab 320s brushes: They are not usually available from the major suppliers in the US, I had to order them directly from the US importer Armadillo Art (see the website on my list of Links of Interest to Artists). They are excellent quality and much more affordable than other major brands.
I hope the presentation and discussion were interesting and useful to all participants! I plan to post a step-by-step demo here very soon.