[Skin Concern] What SPF should you use when trying to get rid of a farmers tan? How about if you’re using an AHA?

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I have a life long farmers tan I want to get rid of on my face, neck and arms. Ideally I wanted to use just an SPF 15 lotion but im not sure if that would be enough to let my skin naturally get rid of the tan.Also if I start using an AHA lotion then what SPF would be needed?Thanks!
Girls Blog 2015
Submitted by doubleaa12324