Not all spots respond similarly; yellow spots lighten best
https://privatebin.net/?b8fc69b75163acec#C3TSL4uJWSSMfc8GpYXdrkhFUBnZQv2bzq3aMsAh1HtS
Not all stains respond similarly; yellow spots lighten best, while gray or tetracycline spots are more resistant and might need longer or expert care.