|Posted by goldenbayfloors on January 7, 2016 at 3:00 PM||comments (4)|
The phrase “screen and recoat” describes the process of sprucing up an existing coat of polyurethane by top-coating it. (This is sometimes referred to as "buff and coat" because the screen is often driven across the floor by a buffer). But the inclusion of the word ‘screen’ is vital because in order to get a new coat to adhere to the old one you must lightly sand or ‘screen’ it.
A screen is just a mesh encrusted with abrasive particles. Because it is a mesh, there are fewer abrasive particles per square inch, making it generally less aggressive than sandpaper (a 120-grit sanding screen, for example, will be less aggressive than 120-grit sandpaper.)
Screens are also used under thick soft pads that further soften the cutting action of the screen. This is desirable because floor screening should only leave enough texture in the floor to allow a new coat of polyurethane to bond; screening should remove only a tiny fraction of the existing finish.