How chrome is applied
Chrome is not painted. A no-wipe gel top coat is cured, then the powder is rubbed into that tacky-cured surface with an applicator until it burnishes to a mirror, and a further top coat seals it. The rubbing is the technique — press too lightly and it looks dusty, too hard and it patches.
Because it needs a gel surface underneath, chrome works over shellac gel, over dip and over an acrylic set, but not over regular polish.