Using spray tan after HT

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It is now 2,5 weeks past my HT.
My hair is really short because it was shaved for the surgery. I really don't like the look of it. Also the white untanned scalp makes the hair look thinner because of it shining through under the hair thats present.

I am thinking about getting a spray tan at a saloon and then also let them spray the scalp to make it look more tan. That would make my hair look a bit thicker.
Could this in any way be harmful to the grafts? Anyone tried this?