unfortunately I've already been sensitived to System Three epoxys due to carelessness while glassing
I don't have any issues yet with Fiberglass Hawaii Aluzine or RR but I've never had issues with PU as stick as it is. We met the guy who used to run Robbie Naish's operation until he got sensitized to the point where he can't get near the stuff anymore.
Having skin allergies requires that when I sand any fiberglass I wear a nonbreathable hooded Tyvek suit with a full face 3M 7000 series respirator and suffer heat stroke in the hot hawaiian sun. At least I don't show up to work on Mondays looking like I have chicken pox or measles.. Kind of takes the pleasure out of making one of these things. I guess thats why I'm always pursuing ways to reduce dust and the need for the major sanding any fiberglass if it's possible. Compsands are a gateway to that with it's EPS core which you can hotwire to shape and if you're good enough you can bag on the skin and exterior laminate to a final finish. Unfortunately I haven't gotten to that stage yet eventhough I know it's possible.
I wash everything down when I'm done sanding including myself but I can see all the glass dust in the dirt waiting to dry out and get blown away with the wind.. Not good..
The toxicity of this past time is it's greatest fallacy..
But then again I can't even remember the amount of gasoline fumes I've inhaled cleaning paint brushes back in the day as well as washing myself in acetone and gasoline to remove the burning PU all over my skin before I hit 18. Probably doesn't say too much for my longivity in the coming years but you're only as safe as the information you have available to you at the time.
So I'd defer to caution if there's advice out there like this now..
Personally I think the fine wood dust from sanding and grinding it to shape is another issue to address.