Warm, soapy water is usually your best bet. Fill up a bucket and use a sponge to gently rub the wall, starting from the base and working your way up. This should get rid of the bulk of dust and grime on the surface, and you'll end up with a much smoother wall for paint application.
Method: Mix a solution of warm water and mild detergent. Wipe down walls, trim, and any other surfaces where you'll be painting to remove dirt, grease, and grime. Tools: TSP (trisodium phosphate) or a degreaser, sponge. Method: For tougher stains or grease spots, use TSP or a commercial degreaser.
An effective technique used by many professional painters to wash walls is to use a slightly wet sponge with warm water and a residual cleaning agent, such as dish soap. This method is highly effective for general wall cleaning.
Don't waste your money on such cleaners, if you ever need to clean before painting, I'd suggest a mild solution of dawn dish soap and rinse well, maybe a few tablespoon of bleach if you have heavy staining or mildew present. Sleep well your paint will last longer than you can imagine.
The best way to clean your walls is to use a mixture of white vinegar (1/2 cup) and warm water (2 cups), and you can add a few drops of liquid dish soap for a deeper clean if your walls are very dirty or stained. For wood walls, add 2 tablespoons of lemon oil or an oil soap to the mix.
Use a moderately high-pressure tip that's strong enough to break up dirt and debris, but not so much pressure that you damage your siding. In most cases, this will be your green (25-degree fan) tip or your yellow (15-degree fan) tip.
I always used aerosol window cleaner as paint prep when I worked auto body. Always had great results and it seemed to kill the static too.
For example, you'll find that acetone is good for removing stubborn stains on porcelain, paint, and melted plastic on surfaces. On the other hand, denatured alcohol is best for cleaning plastic and dissolving the finish on surfaces without damaging the underlying paint.
Stabilising Solution is a water-based low odour concrete primer and render primer used to prepare surfaces prior to painting. This product is very easy to apply and dries very quickly. There is no need to dilute before use, simply apply via masonry roller or brush.
The walls need to be entirely dry before anyone adds paint to them. Curious how long to wait after washing walls before painting. Experts agree that 24 hours is best.
When mixed with water to create an alkaline solution, TSP is a highly effective cleanser, degreaser, and stain remover. It's also used to prep painted surfaces for refinishing or repainting, as it can both de-gloss paint and remove flaking or peeling areas.
**We have never had any problems with Krud Kutter damaging any surfaces, but always do a test patch in an inconspicuous spot just to be safe.
Use a mixture of lukewarm water and mild soap, gently rubbing in a circular motion. Rinse your walls using a slightly damp cellulose sponge.
Rubbing alcohol will not damage a car's paint when used sparingly and in moderation. Diluting rubbing (isopropyl) alcohol to 20% concentration with distilled water is an excellent way to ensure the paint is oil-free before applying a car wax, paint sealant, or ceramic coating.
Simple Green Surface Prep cleans and degreases surfaces prior to painting to remove the dirt, grease and unseen oils that cause paint to be uneven, crack or peel. The phosphate-free formula is a safer alternative to TSP.
Use a commercial cleaner such as Trisodium Phosphate (TSP) to make sure everything is deep cleaned. TSP removes dirt, grime, scuffs, soot, and all other manner of soiling.
The main difference between isopropyl alcohol and rubbing alcohol is the concentration. The concentration of isopropyl alcohol is 100%, while the concentration of rubbing alcohol is less because of the addition of water. Otherwise, the two liquids have similar properties.
While acetone will aggressively strip paint from a wide variety of surfaces, though, mineral spirits is really only effective at cleaning up fresh paint. It can clean brushes and other tools after you finish a project, but once the paint dries, mineral spirits is mostly ineffective.
Do Professional Painters Wash Walls Before Painting? In most cases, professional painters don't wash walls with a detergent solution to avoid damaging the drywall or trim.
Painting and Staining
The acidic qualities of the vinegar will clean and degrease the surface and help the paint adhere.
Once you have removed any old paint or wallpaper, wash down the surfaces that you plan to paint with diluted washing-up liquid and hot water.
In a perfect world, you should wait about three to four days afterward before you start exterior painting. This gives typical surfaces like wood, brick, and other porous materials time to fully dry. It's never a good idea to paint onto still wet surfaces.
The key is to work in sections and keep the nozzle moving at all times. Spraying in a downward and sweeping motion will direct the paint chips away from the surface.