The pre-job walkaround: how a competent polisher reads your paint
Watch what happens before any machine is switched on. A competent technician spends ten to fifteen minutes walking the car with a handheld inspection light, because defects invisible under a shaded canopy jump out under a focused LED beam. They are cataloguing the damage: swirl marks (the spiderweb pattern in sunlight, almost always from dry dusting or bad wash technique), random isolated deeper scratches, water spot etching from sprinkler overspray, and bird dropping marks baked in under summer heat.
Serious operators also run a paint depth gauge over each panel. In the UAE this step earns its keep: many cars here have had a panel resprayed after minor knocks, and resprays read thicker or thinner than factory paint and often carry softer clear coat that cuts far faster. Polishing a respray at factory-paint aggression is how edges get burned through, so if your car has accident history, say so — it changes the job plan.