
To prevent my wallpaper primer from landing on the floor , baseboards , backsplash , or, as in this case, wainscoting , I first cover the floor or vanity with dropcloths . Next I use these strips of thin , flexible , plastic-backed paper dropcloth material to cover anything that the dropcloths can’t reach.

I cut these strips from larger dropcloths. 8″-9″ wide seems to be about right to protect most baseboard heights and other surfaces , such as this chair rail wainscoting in a Houston Heights dining room .
Once I’ve rolled primer on the wall above, I remove the protective strips and use an angled trim brush to cut in the primer along the top edge of the molding .
wallpaper installer