Clean your nails up with acetone as usual
Pull out your petroleum jelly or Vaseline
Apply all around your nail. If you get some on your nail just wipe with a Q-tip
Here's an example of me getting nail polish on my skin. I know I can just clean it up with acetone when I'm done, but it bugs me to do that. Plus I'm a perfectionist and have no patience!
See no nail polish on my skin! Oh ya, just wipe around your nail a q-tip. Hope this helped