After building a few whips, I always end up with short little pieces from the end of the spools that are not really usable on an overlay because they may not match up with the new spool.
I cant stand to toss them out and waste them so I usually put them in one of the under bellies of the whips.
What ends up happening is beautiful and abstract. It looks quite a bit like a random rainbow a lot of the time. It is a beautiful secret, hidden inside your whip that only I get to see. It makes me smile when I think about it.