Please read Exfoliation – AHA and BHA for information on why you need exfoliation, what are AHA and BHA, how to use AHA and BHA, side effects of AHA and BHA, and what to do if you cannot tolerate AHA. You can also find the effective pH range at different AHA concentrations in Most Effective AHA Concentrations and pH.
Dermalogica Skin Renewal Booster contains 10% lactic acid and 0.5% salicylic acid with pH 3.6. It is worth of mentioning that its base is aloe instead of water. It also contains retinol. For all skin types but very oily. It contains a tiny amount of extracts of lemon and bitter orange flower so be very careful if you have overly sensitive skin.
Jan Marini Bioglycolic Bioclear Lotion contains 2% salicylic acid, and about 8% glycolic acid with pH 3. Fragrance free and paraben free. For all skin types. This concentration and pH makes it a very effective exfoliant so start from low frequency.
MD Formulations Vit-A-Plus Night Recovery contains 8% glycolic compound (ammunium glycolate and glycolic acid) and 2% salicylic acid with pH 4. In addition, it has 1% vitamin A (retinyl palmitate). Fragrance free. For all skin types.