Curious why you would have to completely strip the surface? 

I've poured a lot of epoxy, AND, relatively speaking, applied a lot of poly finishes. Regarding that:

- Rather than, for example, stripping a wood floor to raw wood, I'd just scuff it to allow a new coat of poly to go down, as the buffer between the wood and abuse.  Epoxy would be no different, aside the fact I'd only need to apply enough to get a level coat and new cover over the existing surface.

The exception requiring more be done than scuffing the surface would be, if I needed to get a lot of dings and such out of the wood.

Epoxies and poly's play fine together.  I use poly to seal wood about to have an epoxy coat applied (reduces the air the wood releases into the epoxy). I'd have zero qualms about applying polymerized hardening oil with resins, poly, over a table with epoxy on it.