I don't think yo have to worry too much about epoxy being carcinogenic. There are some thinners and such that get used arund it that are. Epoxy is a strong sensitizer kinda like urishiol, or poison ivy. May never bother you, may sensitize you over time, or you may break out instantly. Barrier creme as mentioned is a good way to go. I personally prefer gloves. Never wear barrier creame under gloves, it can cause a huge skin problem like the epoxy rash you are trying to avoid.
Here is an excellent soap for removing epoxy should you get some on your skin:
"Here is the formula for Gougeon hand soap for removing epoxy
6 oz Joy, Dawn, etc dish soap (36%);
4 ounces veggie oil, corn, peanut, canola (21%);
5 ounces shortening, lard, Crisco (30%);
1 ounce corn meal (5%).
Mix in blender with up to 5% water to achieve correct consistency.
This isn't a waterless cleaner. They us it in the Gougeon shop with a bucket of water, since they don't have a sink. All crew members use the same rinse water, but the cleaning effect is better than with the waterless cleaners.
These are volumetric ounces."
Though this sounds like something that might go rancid pretty easily, at least in my environment it has been durable. If I need to remove a little epoxy, I get a dab and it comes right off.