I went to an artist open house last weekend in Redwood City and saw some wonderful examples of oil and acrylic paintings.  One woman Ms. Shaw mentioned she does her oil painting in layers to achieve the flat almost older look.   I checked and think she does this by using a technique of glazing?   I tried to see if this would work on one I started yesterday and obtained some glazing mixture.    It has an interesting effect on the black and white I did when added.   

Asian village (18 x 24)