please,please,please DO NOT paint anything in your interior white,especially if it's black. You'll just ruin everything and it'll look tacky as hell.
Anyways,I've got a dark grey cloth interior and I painted my trim silver. I just removed the parts I was painting (dash bezel w/vents,centre console,radio surround,door handle surrounds),degreased and cleaned them,and without sanding hit them with some primer and then a colour coat. Didn't have any clearcoat,so I never cleacoated it,but it looks fine,however when I paint my car,I'll be matching all the trim with the body colour,so I'll be prepping it properly and spraying it with a gun and it'll have the same finish the exterior will.