I read the Technical sheet on Fat over Lean, and understand that while the fat over lean rule is important, it is not as rigid when using the RF Pigment Sticks Wet-into-Wet.

I am a complete novice and haven't worked with oil paint before.  Can you define Wet-into-Wet for me?  Does this mean the painting done in one daily session, or does it mean working while the paint is still wet for several days after?  I assume that the paint film starts to dry as soon as laid on the canvas, at what point should I be more concerned with fat over lean?  When the paint film is touch dry?

I do not plan on glazing, however, when the initial paint film dries, might want to go back to put in some details- lines to define edges, highlights, etc.  Since I am mixing many colors in the initial wet-into-wet painting and not being very obsessed with fat over lean, do I have to worry about the details being fat and not lean?  I am not thinking of broad passages of color over dried wet-into-wet initial layer.  I have yet to do this as my intial experiment with your sticks haven't dried yet.

Barbara