Gawd no. I paint 6mm WWII to modern. I usually have 100 to 300 on the go at a time. My base coat is the most common colour on the mini (usually the primary uniform colour). I do not prime, just the base uniform colour. Even the “simplest” figures have 6 or more colours, usually 8 or 9 and some go as high as a dozen. I work and often a unit will take months to be finished.