Put on a dust mask to avoid inhaling small particles.Chip off large chunks of spackling with a small metal putty knife. … Sand the remaining spackling in a circular motion with a piece of 120- or 150-grit sandpaper. … Wipe the wall with a damp sponge to remove leftover dust.

How do you remove dried spackle?

Scrape up dried bits of spackle stuck to the floor using a plastic putty knife. Avoid using a metal putty knife — it can scratch the floor. Cover any dried bits remaining with damp paper towels. Leave the paper towels for several minutes and allow the moisture to soften the spackle.

Can you soften hard spackle?

Spackle is used for wall and ceiling repairs. … After spackle paste is applied, it will harden and become part of the wall. It is no surprise that the paste will eventually harden in its container, as well. If this happens, you can add water to it to loosen it up so it can be used again.