While there is no best way to clean walls before painting most walls can be washed using a sponge and warm water.
What to clean plaster walls with before painting.
You first need to seal new plaster to make it less absorbent and to help the topcoat adhere.
Wash the walls with soapy water and allow.
Once again test this solution on a less noticeable part of the wall before using it.
Follow by washing the surface with a well dampened sponge.
Use a caulking gun to apply a bead of latex painter s caulk to small cracks.
For surfaces that have exposure to oil or grime like kitchen walls wash with a solution of water and grease cutting detergent and follow up with clean water to remove any residual cleaning agent.
Prepare a mixture of warm water and a mild soap detergent.
Cleaning cigarette smoke from walls with vinegar using pure vinegar is an excellent way to cut through the worst nicotine residue stains as the acetic acid breaks down the stain plus it helps in removing the stale smell.
Consider a baking soda paste or commercial cleaner.
Wash the walls in a methodical manner.
If your walls are newly plastered here s what you need to know before painting over them.
Mix thoroughly and then apply it to the sponge.
As noted above most paint manufacturers recommend that you clean walls with at least mild detergent and water before painting.
Place newspapers on the floor up next to the wall.
Fill another bucket with cool water only.
How to wash walls with soap and water.
Clean walls before painting to ensure that the paint will properly adhere to the surface.
Sand the walls with a fine grit sanding block to smooth and dull the surface.
Some experts recommend mixing in a little vinegar then cleaning with fresh water then repeating the process three times allow the cleaned walls or ceiling to thoroughly dry before applying a sealer coat.
Combine mild dish soap and cool water in one bucket.
Dip a sponge in the water and wring it out completely to avoid leaving streaks.
Although modern paints are so good that they bond well to almost any surface it will adhere best to surfaces that are perfectly clean and smooth.
Rub that sponge vertically down the wall working one section at a time.
For a baking soda paste mix cup of baking soda with a few tablespoons of water.