Salicylic acid 20% or 30% is generally safe for most people and can be very effective in clearing up mild to moderate acne.
They are generally spaced 2 weeks apart, and I usually recommend 3-6 peels initially, depending on the severity of acne.
For the red marks from old acne, I would recommend the pulsed dye laser, which can help them to clear up more quickly. I would recommend seeing a dermatologist who performs peels and laser therapy on a regular basis.
Good luck!



