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Summary: Make your nail art designs last by applying a top coat nail polish. Learn how to apply a top coat in this free video from a professional nail artist.
"After you apply your nail art, and you let it dry for two minutes, you're going to want to apply your top coat to all ten nails. I use a UV top coat, as I stated earlier. That way the nail polish does not get discolored and so that the tanning bed or the sun does not discolor the nail itself. The UV top coat again is kind of like sunscreen for your nail. You just want to put a nice coat on top the nail, and again just swipe under the free edge, to give it a little extra protection. You're going to want to do all ten nails, and again allow this to dry two minutes. Once you're done with the nails completely, you're going to want them dry in front of a fan, or in front of a light, for at least ten minutes. Try not to get any polish on the skin or the cuticle. If you do, again, it can be cleaned up. This is how you apply top coat to all ten nails."
eHow Article: Applying a Top Coat to Nail Art