The whole idea of CARC is to create a continuous coating for a military vehicle that's impenetratable and won't let chemical agents soak into it's surface even though it's a flat finish. The reason behind CARC primer isn't to make the CARC stick better, it's because the primer has he same sealing properties as the top coat. Think of it as dipping your truck in Plasti-Dip tool handle coating.
In the FS595b color book; 383 Green is 34094, 383 Brown is 30051, Flat Black is 37030, and 686A Tan is 33446.
CARC is an epoxy paint requiring either a "part B" catalyst, or in the case of "one-part CARC" the moisture in the air.
Therein lies the first hazard; inhaling CARC as it's curing will allow it to harden in your throat, bronchial tubes and lungs.
The second hazard of CARC is all the silicas added; ground quartz, ground cristobolite, chromium, green spinel-- all good at causing lung ailments up to and including cancer(s).
The third hazard is in sanding when these silicas are released as fine dust for you to breath.
For applications, a positive pressure respirator is mandatory if you want to stay healthy.
A spray booth with positive pressure and filteration is smart or any breezes will carry the spray and can expose your kids, pets, wife, your neighbor's kids, pets... you get the picture.
For sanding, you'll want a good filter respirator like a Norton or similar, NOT a paint and dust mask like you'd get in a hardware store 10 for $5.00 pack.