Reason 1: the polish was not cutting
A finishing polish refines; it does not level. Swirls deeper than a finishing polish can reach stay. Correction starts with a compound and a cutting pad, then finishes with the polish.
Reason 2: fillers washed out
Many polishes and "all-in-one" products contain fillers. The car looks corrected in the shop and the swirls return after the first proper wash.
Reason 3: holograms
A rotary polisher used with the wrong pad, speed or technique leaves its own fine buffer trails. They look like swirls in the sun. They are removed with a dual-action polisher and a finishing pass.
Reason 4: it was never decontaminated
Polishing over bonded iron, tar and grit makes new scratches as it removes old ones. Clay and iron remover come first, always.
What a correction does differently
Decontaminate, measure, compound, polish, inspect under lights, protect. From $500. Then a Ceramic Pro coating so the swirls do not come back in the wash.
