Skin assessment: Fitzpatrick skin type, sensitivity, and concern mapping. We pick the chemistry glycolic, salicylic, TCA or Cosmelan to match. Prep: Skin is cleansed, degreased, and a barrier cream applied to sensitive perimeters. Eyes and lips are protected. Application: The solution is applied evenly with a brush and timed precisely, typically 3-10 minutes depending on agent and depth.
