One of the easiest up-sales in the detailing industry is headlight restoration. When walking into a detail, if you notice foggy headlights, pitch your client on a headlight restoration. Explain that this will help the aesthetics as well as the visibility. A perfectly mirrored exterior can be completely ruined by those pesky foggy headlights, but that doesn’t have to be the case. Have you ever restored a customer's headlights?