Not all stains react similarly; yellow stains lighten best
https://www.4shared.com/s/fPgAFhJQhfa
Not all spots respond equally; yellow spots lighten best, while gray or tetracycline spots are more resistant and might require longer or expert care.
Not all spots respond equally; yellow spots lighten best, while gray or tetracycline spots are more resistant and might require longer or expert care.