Have you seen any results from using facial pigmentation ointment?

I'm thinking about buying an over-the-counter ointment to help with acne scars and sun-induced pigmentation. While hydroquinone-based ointments are said to be effective, I'm cautious because they can make my skin more sensitive if used incorrectly. I'm curious if anyone has actually experienced a reduction in blemishes with these ointments, and how long they should be used. Some people say they should only be applied at night and that special care should be taken to block UV rays. Do you have any tips for safely using these ointments? Laser treatment is a bit expensive, so I'd like to try self-treatment with ointments first. If you have any recommendations, please let me know. Please share your experiences with me as I strive to achieve a clear, pigment-free skin tone.