How to Plaster a Coarse Wall to Paint It
- 1). Take all the furniture out of the room. Lay out tarps at the bottom of the wall. Set up your ladder.
- 2). Scrape the wall with your drywall knife, taking off any loose paint or plaster.
- 3). Go over the whole wall with your vibrating sander, just enough to take off any shine.
- 4). Spread skimcoat plaster over the wall starting at a top corner and moving down and across, using your drywall knife. Run the knife at a shallow angle over the surface so the plaster goes on very flat and thin, filling the low spots.
- 5). Let the plaster set for six hours.
- 6). Run your drywall knife over the surface at a steep angle to knock off any ridges or lines.
- 7). Spread on a second coat of skimcoat plaster in the same manner as you did the first, in a thin, flat layer. Let it dry for 12 hours.
- 8). Lightly sand the skimcoated wall with your drywall sanding pad. The wall is now ready for painting.