Julie is the professional at helping people and her advice is probably the best. I would be careful about how heavily you stress the danger of the epoxy cloud. If you put too much fear in their mind, they may start to complain that you are doing it in their neighborhood (or county) and try to make you stop. And they would have a point, even if crossing the road to walk up your driveway is a bigger risk. The trick is to inform them that there is a risk, but not to have them over react. You want them to be safe and still be able to get the work done.

When I work outside with a respirator and tyvek suit, I do it in the back yard where I am less likely to invoke visions of Chernobyl.

: As for the epoxy cloud problem, that is where You ABSOLUTELY have to be firm.
: Be polite and tell them you are concerned for their safety, especially the
: little one. That IS why you are wearing the mask and long sleeves. ( I
: hope ) I have told folks that I can not continue with them standing there,
: and I HAVE to get this done. Sometimes feelings must suffer so that health
: will Not!! When you tell them later as Julie mentions, they usually
: understand and will be more careful.