Jake, 'Fumes' are the result of the volatile reactive solvent styrene (aka vinyl benzene) coming into contact with air and evaporating. If you have a closed can of styrene, you don't have any air contact, no 'outgassing', hence no fumes (duh <img src="http://www.catsailor.com/forums/images/graemlins/tongue.gif" alt="" /> ). Resin infusion is a 'closed' process. It's like building a boat without taking the caps off of the cans of resin.
