i tested a section with vm, and all i can say is wow, i'm impressed. keep in mind i'm pretty new to this detail stuff so there may be other products that work well also. but it made black finish look a few shades darker, covered the very little micro marring that was left or removed it? and made the surface nice and slick. it did all this and was still crystal clear and glossy. i don't know if it's just me, but i would think this would work well under a sealant or wax, especially on dark colors.