Why swirl marks show on dark paint
Swirls are fine scratches that catch the light around a reflection. Dark paint shows them because there is nothing else to look at.
Journal
Care notes from the bay: how paint gets damaged, what correction and coatings really do, and how to keep a car looking finished. Each note is dated, names its author and lists its sources.
Ceramic coating: what it does and what it does not
A coating makes paint slicker, glossier and easier to clean. It does not make it scratch-proof.
Washing a coated car without undoing the work
Rinse first, two buckets, a pH-neutral shampoo and a soft towel. Skip the brush wash.
Leather care between details
Clean little and often, condition lightly, and keep it out of the sun.