The question we hear often is, can you refinish an engineered wood floor? Sellers will tell you yes every time. The answer depends on the wear layer, or the thickness of the wood. The wear layer is the top solid part of an engineered hardwood floor that will wear away as your floor ages. It is the only re-sandable part of a floor—sand past the wear layer, and you get to the plywood core.If you read the marketing, you will hear it stated unequivocally that you can refinish  2-3 millimeter engineered. floors. This is a fantasy, they cannot possibly be refinished unless you did it brand new out of the box.  The wood is not there, you will hit the composite material every other foot and probably quit after 10 minutes.

However- Check H Nance Non Sandable Floors