This is about the best overall safety page I've spotted on the web:
http://www.ipmscanada.com/safety.html
However, IMHO, 90% of the safety practices (other than common sense) that are professed on the web are completely unneccessary unless a modeler has specific health issues that modeling could aggrivate (i.e. Asthma, allergies, chemical sensitivity, etc.) Again, this is only my opinion and I'm a stubborn modeler. I also eat rare red meat, drink full-sugar soft drinks, only use real butter when cooking, smoke two packs a day, and wash grease off my hands with gasoline. So I may not be the best advice giver in the world.
I've used enamels exclusively - first between the ages of 11 and 20, and now between 40 and 42. I've never owned a respirator, dust mask, or paint booth. I have done, and do 100% of my painting indoors, usually with a fan going, but rarely with a window open. Call me an unneccessary risk-taker, but I feel that if I needed to use a respirator, latex gloves, safety goggles, and a chemical apron, modeling would cease to be a hobby and would become a job. That's just me. Everyone needs to evaluate their own situation and determine what safety measures are right for them.
I hope this web site helps.
Enjoy your modeling...