A coating locks in whatever is under it, so the paint gets polished first. Price depends on prep and coating length.
Prep before coating
Example photo Enhancement (~2 hrs) Good paint, just needs a gloss boost.
Example photo One-step polish (~3–4 hrs) Light swirls removed before coating.
Example photo Full correction (5+ hrs) Best finish locked in for years.
Coating length
Example photo 1–2 years Entry-level protection.
Example photo 3–5 years Strong long-term protection.
Example photo 5–8 years Maximum durability.
No need to pick a level. I'll look at your vehicle in person and confirm the tier and price before any work starts.