A rubber band is all you need to fix a French manicure in a jiffy!
Grab a thick band from your office supply drawer, and wrap it around your nail, leaving the tip exposed. Now you can remove polish, re-apply, and even add a top-coat–without affecting the main part of your manicure.
A second way to use this tip will add some sparkle to your mani: with the band in place, add a coat of clear polish, then sprinkle on some nail foil for sparkling French tips. You can use this method on one finger or all ten for a dazzling French manicure.