Every reef keeper should have a pair of these and use them every time their hands are in the tank. They take a second or two to put on, cover most of your arm and are proof against bites from even big Maroon Clownfish..
If you are on a budget, here is a pair for under $10. I can't speak to the longevity of these though.
For $24 the Coralife gloves should last forever. My last pair was going strong after ten years, but got lost in a cross country move...