Thanks and I will look into it.

To answer your question: I fact it's soft pastel and I don't need to account for drying time. Doing this in oil it works best by blending wet-in-wet, preferably with a finish of a fan brush.

The pastel in fact was done alla prima but oil can take make layers to complete. Mostly I do oils within 1 or 2 weeks. Pastels in one day or a couple.