Redness After 18% Salicylic Acid Peel

I tell my patients to wear a large brimmed hat to keep sun off the face and apply Vanilpy or Aquaphor Healing Ointment frequently until the skin heals.

Salicylic acid peels up to 30%, in general, are safely used in people of all skin pigmentation types.  From what I can see in your pictures, you have a very normal amount of red/brown color that I would expect to see 24 hours after your peel.  Any dark spots you had to begin with tend to get darker before they peel.  Redness and darkening can last for 4-7 days while the peeling takes place.  Areas around the mouth, eyes, and nose tend to peel first.  I think you will be very pleased with your peel based on your skin's reaction so far, and I would be surprised if you developed any hyperpigmentation.  However, it's very important that you keep they areas moist with a cream or ointment (e.g. CeraVe or Aquaphor), use a gentle cleanser like Cetaphil, avoid picking, avoid rigorous exercise while peeling, and use at least SPF 30 sunblock consistently.