Do you hold to buff and coat engineered wood floors after installation? ...

Fixer Upper?
Answers:    no, most are treated with equal finish as solid hardwoods are, aluminum oxide. the amount of this can differ between the two, so a coat or two of polyurethane would make a visible change. this will serve as another lode of protection/anti-wear that would prolong the finish of the floor. remember that you will only be capable of apply a one time light sand to the floor if there is ever any stipulation.
I obligation a Do-It-Yourself Site?
Typically they come universally with a finish already impregnate in the wood. I'd voice no.