Don't be too nervous about the isocyanates. I've been painting 7 days a week, since about 1980, using catalyzed primers, air-dry basecoats, and catalyzed clear.

I don't accept responsibility for this info, but I'll share it. I use "oiless" air compressers, to eliminate the carbon dioxide, a blow through mask, and no special clothing.

That is 27 years, with an average exposure to isocyanates of about one day out every 2 weeks, (since I do a lot of sanding and graphics).....so 26 times a year for 27 years is over 700 days.....and I haven't grown any extra limbs, or turned green.

I know the danger is real. I have seen friends who used a charcoal filter mask, that had catalyst poisoning within 10 years or less of painting full time. Usually your tongue or throat will swell, when you've reached your limit. At that point your body cannot absorb any more, so you either quit using it, or I have one friend who bought and uses a full-body suit and air system.