I finished my work with ink and sealed whole painting with initial layer of oil. It has to be very correct, but doesn't really have to be totally perfect at this stage... And it is not perfect. Claybord is not the easiest surface for Oil paints, but after it took the primary layers, things will be getting easier and more controllable. I;'m very much looking forward to it.
My next step will be value modeling in tempera. Much more complex, compare to the ink version.
Looking forward to start on it!