I use WEST and assume that most of the (warnings) are the same. Here's a condensed version of their warning.
"Avoid breathing concentrated vapors and sanding dust. West epoxies have low VOC content, but vapors can build up in an unvented space. Provide ample ventilation when working with epoxy in confined spaces, such as boat interiors. When adequate ventilation is not possible, wear a NIOSH approved respirator with organic vapor cartridge."
I have used West right inside the house. I used it to glue components of a granite counter top in my kitchen (works awesome for gluing granite on the un-polished side) and took no more precaution than keeping a window open a bit with no apparent affects on any of us in the house (live in Canada and did the work in the very late fall, so the window wasn't open a whole lot

) and have used it on smaller projects worked on in the basement, again with nothing more than a "cracked open" window and the basement door shut.
Although, to be fair, it's not something I do everyday. I feel an occasional bit of (epoxy) in the air is probably no worse than many of the household chemicals we use to clean sinks and bath tubs etc.
I would feel more than safe working inside the garage - would simply keep the door open until the epoxy has hit the green stage (a couple of hours depending on the hardener in use) and any door to the inside of the house "closed".
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Graham
Yes, Plywood is "real" wood

A "professional" is someone who gets paid for their work - it doesn't necessarily mean they are good at it
