The walkaround: what a good detailer checks before quoting
The second check is contamination. The detailer runs a hand — often inside a thin plastic bag, which amplifies texture — across the paint. Paint that feels gritty rather than glass-smooth is carrying bonded contamination: industrial fallout, brake dust particles, tar, and in the UAE, mineral deposits from hard water and the occasional cement overspray from the construction site next door. None of that comes off in a wash, and polishing over it drags the particles around, so it dictates a decontamination stage before any machine work.
Finally, they will inspect under proper light. Swirls, buffer trails from a previous bad polish, water-spot etching and bird-dropping etching all look different under an inspection lamp, and each needs a different fix. Water spotting deserves a special mention here: sprinkler overspray and mineral-heavy washing water leave alkaline deposits that, baked at 70-plus degrees, etch physical craters into clearcoat within days. If a detailer points these out during the walkaround rather than discovering them mid-job, you are dealing with someone who has priced the work honestly.