Thanks BL!
I'm just really OCD and kinda crazy.
I don't know about the spray, but sanding takes the UV coat off just fine.
Yes, if you strip the outside of the lens past the UV coat, a new UV coat must be applied or it will quickly yellow again. Buffing with compound or polish to reduce haze usually doesn't affect the coat much, but if sanding is required, that coat is gone.
I've been researching UV coating and curing lights and it seems Opti-Coat 2.0 is the way to go for long lasting professional UV protection.