You can try scrubbing some of it off with Comet or Ajax. Bleach will help at least lighten it. Make sure to rinse well and put lotion on so it doesn't dry your hands out. Most of the rest of it will have to wear off. I almost always wear rubber gloves or use a plastic sack while handling Blu Kote, I learned the hard way! LOL
I think the reason Comet or Ajax work is partly b/c of the bleach and partly b/c of the abrasives. You could try a scrubbing face cream with pumice in it and/or baking soda. I've heard about a couple cases of BluKote Measles... You might try searching on measles to find that past post. I think the woman had some success with a face cream of some sort.
There's a product called "Goof-Off" that's great for removing paint. I can't vouch for its efficacy on Blu-Kote though. I just bought some Blu-Kote to slather on some dominance-pecking chickens if they get cheeky. I appreciate the heads up about the gloves.