In reply to MorganPreecey:
Whenever I've had big flappers it's not been on the fingertip, so taping it up hasn't been too much of a bother.
I've had success with two methods:
1 Don't rip off the skin - glue it back down with superglue and tape over the top (let the glue dry first, unless you are Paul Piana/Todd Skinner)
This stops the exposed flesh drying out too quickly and forming a painful thick scab, but also protects the raw skin from painful contact with anything. After a few days the original skin falls off and the skin underneath is almost ready to go.
However, applying commercial superglue to raw flesh is a VERY BAD IDEA, so either score some medical grade superglue, or don't do this.
2 Pull the skinflap off, and let your finger dry out for about a day. Then cut back the now-dried bits of skin as far as you can (this might hurt a bit. Sorry). Now start moisturising the painful, raw skin. This will hurt. Keep going, and your finger will be back to being usable in a surprisingly short time.
Generally, I don't get many flappers these days not because my fingers are permanantly glue-ridden, but because I climb a lot less, and I keep the skin in good condition by moisturising.