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Yes, you can add the odorless or Genesis thinner to any of them.
And yes, the lip color is already mixed just perfectly with the Genesis thinner, no need to thin farther. Just slightly load your cats tongue (filbert) brush with the lip color right from the jar (stir first) and put a very thin layer on, bake, check to see if you need another layer first, and then if you do, another VERY thin layer, bake. The lip color tends to darken with baking.

With the crease and blush colors, definately add odorless thinner. :)