Fine grit sandpaper - You need to purchase 220 grit sandpaper in order to make sure your floors are smooth to the touch and any marks left by previous sanding are gone.
Sanding - After you have scraped most of the old paint off of the beadboard, go over the surface with a medium-grained sandpaper to remove any residual paint.
If it's just a small amount, try sanding it down with a light-grit sandpaper to smooth it out and then apply a small amount of varnish with a foam brush.
Surf boarders know that blowing sand can stick to the wax on their boards, making the surface feel like sandpaper rubbing against their flesh.
Medium grit sandpaper - If the floors have a few dings and the polyurethane is wearing thin in spots, you can get by with 120 grit sandpaper.
For your next home repair for drywall, take a little extra time to let the compound you're using dry between applications, and don't forget to sand the area carefully with fine grit sandpaper.
Course grit sandpaper - The grit of the sandpaper you need to start with depends on the damage to the floors and how many coats of polyurethane are currently on your old floors.
If you're having trouble trimming, however, you can also try sanding the edges lightly with fine grit sandpaper and adding a bit of brown ink for a "distressed" scrapbook look.
Mineral, vegetable and animal substances, by means of tools and apparatus of stone, wood and bone - tools for cutting, or edged tools; tools for abrading and smoothing the surfaces of substances, like planes, rasps and sandpaper; tools for striking, that is, pounding for the sake of pounding, or for crushing and fracturing violently; perforating tools; devices for grasping and holding firmly.
Quartz is a valuable grinding and polishing material, and is used for making sandpaper and scouring-soap. It is also largely used in the manufacture of glass and porcelain, "silver sand" being a pure quartz sand.