Should I Go Back and See What Went Wrong This Time? Melange Peel Multiple Times?

I get the Melanage becuz they said it was the only one made for olive complexions. ie, Hispanics, Asian middle eastern. I use the Obagi system year round. This was my 3rd one. The second one was the beat. The area around my mouth and chin did not peel as much as the previous two. It looks like I have a mustache that needs shaving....or 5 o'clock shadow. Should I ask for another treatment just on those areas and should they charge costs me $750 for the peel, which I think is overly pricey.

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