You can purchase large sandpaper sections, a sandpaper extension base, and an extension pole from your local hardware or home improvement store.
You don’t want dust getting stuck in the joint compound mixture later on.
You can find joint compound at your local home improvement or hardware store.
This powder can be found at most home improvement or hardware stores.
Use a different palette knife than the tool you used to apply the compound-powder mixture initially.
For instance, if your room is 70 °F (21 °C) and not very humid, it may only take 10 hours for the compound to dry.
If you can still see visible grooves in the wall, you may need to apply an extra layer of joint compound and mud powder to the walls. The drying time will ultimately depend on the temperature and humidity levels of the room.
As an extra precaution, you might want to wear a breathing mask so you don’t breathe in any paint fumes. If you’re working in an enclosed area, consider opening a window or setting up a box fan to improve the ventilation of your workspace.
The primer is more likely to stick to a rough surface than a smooth one. If your wall feels rough from when you previously used sandpaper, you don’t have to worry about this.
Shellac-based stain blocking primer is best for tongue and groove walls. You can find this at your local hardware or home improvement store. [16] X Research source
If you have gloves on, lightly tap the wall to make sure that the wall is dry.
Double-check that the wall is completely dry before sanding it again.
This second layer of primer helps to better disguise any leftover compound.
If you have to paint any trim or door frames, use a small, 4 in (10 cm) wide paintbrush to get the job done.
Wait around 1 day to make sure the paint is completely dry. [23] X Research source
