Swirls in an automotive finish can drive you to the brink of insanity..........if you let them.
There are two types of automobiles; daily drivers and garage queens and nothing in the middle. While some are driven more then others they're either driven on the road or locked up in a garage never to see the light of day.
When I'm detailing a finish I ask myself a couple of questions; when is enough enough and will the customer be satisfied. Now I know this isn't solving the issue at hand but it puts into perspective the level of perfection that's trying to be achieved.
When a car comes from the factory they don't add a swirl additive to the paint. Swirls come from washing, drying, airborne contaminates, swirling wind, the sun, dust, rain, snow, sleet, and just about everything else for that matter.
Swirls, while see by the naked eye, are almost immeasurable in depth. Compounds and polishes do abrade the surface removing them to a certain degree but merely reducing them so that they can't be seen other than with a microscope, this is where perspective kicks in.
How much is enough? When your pretty much satisfied with the work you've done and with its results........ Keep your goals realistic and consider all the variables.