In the first place, Latex wouldn't be on my list of suitable coatings for a piece of furniture that would be exposed to water and compounds (soaps/cleaners) that stain. Latex is notorious for not being stain resistant.
Thanks for bringing up 'Fabulon'; I was trying to remember its name the other day, on a different thread. My knee jerk reaction is 'absolutely not!', but really, you need to contact the Fabulon mfg. and ask them directly for a definitive answer.
If it's already painted I'd suggest a couple of coats of clear acrylic. It's waterproof and damn near bulletproof, and compatible with latex paint. If it had been my vanity, I'd have used gloss marine paint...but a little late now?
By the way, doesn't Fabulon come in White as well?