You’ll need this if you’re sanding a modern, aluminum oxide finish.

Bona Prep is useful in two different ways. First, if you are recoating an existing polyurethane floor and discover that there is a built-up, waxy residue from an improper cleaning product, it can be used to scrub the floor using a thin maroon buffing pad to strip off the offending layer.

Bona Prep is also a crucial part of the sanding process if you are trying to remove a modern, aluminum oxide finish. These finishes are so hard that even coarse abrasives have difficulty gaining the traction they need to “bite” into the finish.

32 oz.