Some tanning formulas contain walnut or almond extract, and while typically those ingredients don't cause a reaction when applied topically, inhaling them can be problematic if your nut allergy is severe.

Speaking of inhaling, wear a nose piece to avoid breathing in the spray, regardless of any nut allergies. The facility should be well-ventilated, too.

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Short answer: It depends on the prep.

Exfoliating and shaving before your spray tan is the best way to make sure it lasts as long as possible (7 to 10 days) and goes on evenly, according to Evans. You want the tan to apply to fresh skin cells, not the ones that are about to shed, says Evans. Use an oil-free exfoliating method, like Earth Therapeutics Super Loofah Exfoliating Wash Cloth, $6.

Plan to shave at least 10 to 12 hours before if you can. Shaving can sometimes irritate skin, and that's the last thing you want before getting a spray tan.

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Deodorant, makeup, perfume, that ring your grandmother gave you that you never take off -- all of it has to go. Not only do you want to protect your jewelry from an instant bronzing, you want to make sure that nothing interferes with the tanning agent adhering to your skin.

Most spray tan salons have makeup removing wipes, but it's best to just come without anything on in the first place.

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For a total beach bunny, endless summer vibe, you'll want to get completely naked during your spray tan. Tanning technicians will not bat an eye at your completely bare body.

That said, we totally get being uncomfortable with all your "wobbly bits" hanging out, in the immortal words of Bridget Jones. Spray tan salons have disposable paper thongs you can wear if you'd rather not go bare. Having that thin line of untanned skin is also a really satisfying way to judge just how pale you were before you spray-tanned your way to being a bronze goddess. You can also choose to wear your own underwear (we suggest black), or even a dark bathing suit.

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Different spray tanning technicians will have their own techniques, but most start with the top (they'll tell you to take a deep breath before lightly misting your face) and work their way down. They'll ask you to stand in odd positions that will remind you of doing the robot. Pay attention -- they're trying to prevent pale creases and patches.

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