Tnx for the reply! I changed the layer setting from 0.1 to 0.15, (did not wanted to go to 0.2 right away) and seems helped. I printed a test piece with a random color and it turned out to be perfect. When I went back to the color we use to make the model. It was almost perfect. Maybe sensitive to the type/brand of filament too. But overall it seem works better with 1.5. I may try 2.0.
Tnx again! We'll show when completed.