The phrase "visible scratches" means marks or lines on a surface that you can easily see with your eyes.
Sentences with «visible scratches»
Moreover, on used cars, squeaks are an often apparition, along with visible scratches on the rough cockpit materials. (drivemag.com)
Then try to remove visible scratches: cover scratched areas with fabric to hide the damage and spray with pet repellent. (petco.com)
According to Corning, Gorilla Glass SR + «significantly reduces visible scratches while delivering the toughness, optical clarity and touch sensitivity that make Gorilla Glass famous.» (androidcentral.com)