Those fine circular scratches you only see in direct sun are wash marks, and no wax hides them. Machine polishing is the only thing that actually removes them.
Correction means levelling a tiny amount of clear coat until the defect is gone. That is why the result lasts and a glaze does not. Under sun or a work light you see the difference immediately, because light stops scattering off a thousand tiny edges.
There is a finite amount of clear coat on a car and once it is gone the only fix is paint. So a scratch your fingernail catches is usually through the clear and no amount of polishing removes it safely. Same with chips down to primer or metal.
Anyone who tells you every mark will come out is either not going to do what they promised or is going to take too much clear off trying. We assess the panels under a light first, tell you what will come out and what will not, and then do the work.
Correction is undone by bad washing faster than by anything else, so the paint gets sealed afterwards and you get an honest conversation about wash technique. Two buckets, a clean mitt, and staying out of the brush tunnel keeps corrected paint looking corrected for years.
Correction is also the right first step before a full wrap on a car you plan to unwrap later, because whatever is in the paint when the film goes on is what you find when it comes off.
Park it in direct sun and look at the hood from an angle. If you see fine circular scratches like a spider web, that is swirl marks and that is what correction removes.
In the right hands, yes. It is a controlled process, and the risk comes from people who go too aggressive on thin or already-polished paint. We check before we cut.
The defects are gone permanently. New ones come from how the car gets washed from then on, so the answer really depends on you.
Only if you plan to remove the wrap later and want good paint underneath. Vinyl also telegraphs whatever is under it, so heavy defects are worth addressing first.
Send a couple of photos taken in direct sun. That usually tells us more than a description does, and the estimate is free either way.