The Cosmelan peel is not a very deep peel. You will have flaking on days 3-4. The at home application may cause some peeling too but you can gauge that and apply less often if needed. Once you have stopped peeling, I like a tinted SPF instead of foundation.
Hope that helps!
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You can use makeup usually after a week of doing Cosmelan as long as the peeling has ended. Best, Dr. Green