The only way I can get a smooth ethnic skin tone is to use Genesis paint mixed ONLY with Genesis thinner. Nothing else added to the mix. Odorless thinners make for a blotchy baby for me.
do very thin layer and add 3 drops of linseed oil to your skine tone paint, i paint it on with a brush then blend / pounce it with a large mop brush. i learned this from lara …the linseed oil helps tone with the blotchies…sage