I recommend reading the literature from West System and System Three. In short, the fumes shouldn't be much of a problem if there is good ventilation. If there isn't you should wear an appropriate respirator. Avoid contact with skin. Most importantly, use a respirator when sanding epoxy that has not completely cured, keeping in mind that it could take a week or so for it to cure fully. I'm not an expert. That's just some of what I gathered from the literature. Please read it for more safety information. Charles Neuman PTG Assoc, Long Island
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