I am familiar with your experience.
It's not the problem.
AIFM has never caused full body hives in anyone. In the 11 months it's been out. Using a seed oil that one might be allergic to does and HAS caused full body hives. He's using a new UG gear. The maker probably uses oils he shouldn't.
Even your experience, and you're the most sensitive case, did not result in hives in places you didn't use it. And I'm betting it didn't result in hives ANYWHERE but rather a rash as you posted here. It's never caused hives.