Pull your car into direct sun and you'll probably spot swirls, wash scratches, and a dull haze. Paint correction is the machine polishing that takes those out and brings back a clear, mirror-like reflection. It's also the step that has to come first, before any coating or film goes on.
We read the paint under dedicated lighting and check its thickness with a gauge, then use the gentlest process that still gets it fully corrected, whether that's one stage or three.
We call it done when the defects are actually gone, not when a timer runs out.