So, I started taking some oil painting classes; I've never taken any, and I found a place that give real professional academic formations. I'm just getting started, so now I'm practicing and familiarizing myself with new notions. We haven't started with colors and mediums yet, for the first class we just used raw umber color, titanium white and solvent. Basically, this could be the under-painting.
I made this Marilyn portrait (12' x 12') in about 4 hours today. First step (pic on the left) was done with just raw umber color mixed with solvent. This is almost like water-color painting, but better because it's much more flexible and doesn't dry as fast. Took me about an hour. The second pic is the same thing, just adding more details, and a second layer in the darker areas. Also took me about an hour.
For the third step, I made gray-scale colors using raw umber with white. You can't see too well on the image, but even the lighter areas are covered with paint. I'm not too happy with the raw umber color I used though, the one I borrowed from another student yesterday had a much better opacity and dried much faster, which made it much easier to add new layers on top one another. Anyway, this step took me 2 hours.