Still Life with Three Lemons and a Mug (Day 2)

Today is second day I'm working on this painting.
I started applying oil paints of local colors. I'm not using any medium other than the Eco-House (the non-toxic, odorless, eco-friendly solvent that I use in lieu of turpentine. It's made of orange peel.)
If you look close, you might be able to see the acrylic underpaint through the oil layers, which I intentionally left that way.
I still don't know what to do with books on the background, and decided to cover with ultramarine blue for now, which appears to be dark brown because of the cadmium red underpaint.

Now I have to wait until the surface gets dry enough, so I can paint more details. For me, this is the hardest part in oil painting - waiting - it really takes patience. (And I'm sure there are many out there agreeing with me.)