Okay, this is mixing pigments (& blue tube watercolors for some of the glazing; the particles of dry pigment just don't seem small enough)with vinyl acetate bookbinder's glue (also available as a sizing glue for preparing canvases.)
Again I'm using transparent layers of red, then yellow, then blue under everything. At each stage I hit the brightest spots with a layer of transparent white (which makes everything painted over it brighter.) Getting the values (dark/light) right before worrying about colors seems to be a good technique for making paintings at all realistic--and using light to brighten the light spots works far easier than starting with a white background & adding darks! (For the first time I feel like I know what I'm doing! & if I can do this, anyone can.)
