chemical peel for PIH - which strength did what for me

went through glycolic 30% (gentle, had to stack), mandelic 40% (best for my sensitive skin), TCA 15% spot treatment (big gun, used carefully). for hyperpigmentation i got the most mileage out of mandelic 40% every 4 weeks x 4 sessions + daily tranexamic topical between. mineral spf is the whole ballgame.