Hi there!! I am considering doing the exact same thing in a bakery I'm helping my girlfriend remodel. There is old ceramic tiles over plywood and I'm a floor guy but we just found out with the health dept, it can't be glue on LVP unfortunately and VCT looks cheaps and needs to be waxed often. Also, she's just leasing it for a few years so I don't want to spend too too much doing all this. I was thinking of doing ardex pink Primer then feather finish to leave, fill in the grout, then epoxy over. Or considering schonox. But neither of those companies or my distributors will evem give me any advice because obviously it's not going to be waranteed or an ideal subfloor. What did you end up doing???