Since when has the FDA had any oversight into equipment?
Are you kidding me? Any equipment used in the production of food or drugs must be validated. A mom and pop shop that doesn't get inspected by the FDA has a relaxed set of rules (little exposure to the public). A major corporation poses more risk to the public and if something goes wrong in the public sector a visit from the FDA is eminent. If you arn't following the protocols and you get caught it will cost you. And let me tell you it is all about records.
Heck, you are lucky if a radio in a honey house lasts a year, because the tiny honey droplets in the air will eat it up.
Pretty good reason to keep the rpms on the low side so it doesn't vaporize the honey. I have had motors engulfed in hydro gels that would eat the epoxy off the floor. Twenty three years and still running. It makes a difference how you do it and what motor you use.
The only thing is, the surface footage will be different for the top bar and the bottom bar of the frame, since they are at different diameters.
You only need to be concerned with the the part of the frame that is at the outer most diameter.