What to Ask Before Someone Polishes a High-Value Car

Do you measure paint thickness, and will you show me the readings?

A paint depth gauge tells you how much material is on each panel before anything is removed. It finds repainted panels, panels that have been corrected before, and panels that are too thin to correct safely. It is the single piece of equipment that separates a shop that knows what it is doing from one that is guessing.

The right answer is yes, across every panel, and here are the numbers. A shop that does not measure is polishing blind. A shop that measures but will not show you is measuring for its own protection rather than yours.

What lighting do you assess and work under?

Paint defects are invisible under diffuse light and obvious under a point source. A shop that assesses in a bright open bay or in daylight is not seeing the marring it is about to correct, and it is not seeing the haze its own polishing leaves behind. Focused inspection lighting — handheld and overhead — is the minimum.

Ask to see the car under their light before work starts. If they cannot show you the defects, they cannot show you they are gone.

Will you do a test spot first?

A test spot is a small area corrected with the intended pad and compound before the whole car is committed. It shows whether the approach works on this paint, whether the paint is harder or softer than expected, and what the finish will look like. It takes twenty minutes and it is the difference between a plan and a hope.

The right answer is always, and you are welcome to see it. A shop that skips test spots is applying the same method to every car regardless of what the paint is.

What will you refuse to do?

This is the most revealing question. A shop that will do anything you ask is a shop that will chase a deep scratch through the clear coat because you asked it to. The right answer includes specifics: they will not chase a mark that catches a fingernail, they will not do aggressive correction on paint below a certain thickness, they will not use a rotary on a soft finish, they will not coat over defects.

You want the shop that says no. The one that says yes to everything is going to say yes to the thing that ruins the panel.

What has gone wrong before, and what did you do?

Every shop that has done real volume has burned through an edge, hazed a soft finish, or found a panel thinner than it looked. The honest ones will tell you about it and what changed afterward. The dishonest ones say it has never happened.

Follow up with: what happens if it goes wrong on my car? You are looking for a clear answer about responsibility, not a shrug.

How long will the car be here?

Correction on a high-value car is a multi-day job. Decontamination, assessment, test spot, correction panel by panel, refinement, inspection, protection with a proper cure. A shop that quotes a day for a full correction and coating is either cutting stages or working fast enough to make mistakes.

Ask for the timeline and ask what happens on each day. The answer should be specific and it should be longer than you hoped. That is the right answer.

This is how we work, and we would rather be asked. Our correction page covers the process and the River Hills page covers older finishes specifically.