Is glycolic acid ok for darker skin? (Photos)

I have some blemishes I would desperately like to reduce. They are not so much from acne as they are from [ingrown] hairs, tweezing. The main place is on my chest..above/between breasts and my neck, although I do also have some hyperpigmentation in my face from prior acne that I could also address. My question is, would it be ok and/or advisable for me to use a 40% glycolic acid on these two areas?