Thanks a lot eastman! This one was done in Createx opaque fluorescent orange. I find it works best when built up slow with light coats as apposed to shooting it fast and heavy.
One other thought. If you ever plan on coloring anything you find, a good read is:
Dyeing and Bleaching Natural Fly-Tying Materials by A.K. Best.
You can probably find it through a public library or in a used book store.