For those of you who have used facial pigmentation ointment, have you seen results?

I am considering buying an over-the-counter ointment to remove acne scars or sun-induced facial pigmentation. Although I hear that ointments containing hydroquinone are effective, I am cautious because I have heard that improper use can make the skin more sensitive. I am wondering if anyone has actually seen their blemishes fade after using such ointments, and how long I should use them. I have seen warnings stating that they should only be applied at night or that special attention must be paid to sun protection; are there any tips for using these ointments safely? Laser treatment is a bit too expensive for me, so I would like to try self-treatment with ointments first. I would appreciate it if you could let me know of any product names you would recommend. Please share your experiences with me in my efforts to achieve a clear, pigmentation-free complexion.