Prepping is one of the most important parts of an interior paint job in Winnipeg, and a big part of prep work is cleaning your walls. Paint needs a clean surface to bond properly. Without cleaning, dust, dirt, and grime can cause poor paint adhesion, which ultimately leads to peeling, flaking, or an uneven paint job.
So, how do you clean your walls before painting? Is acetone a good choice? Are there other options? Keep reading to find out.
What is acetone?
Acetone is a clear, colourless, liquid solvent commonly used in nail polish removers, paint thinners, and industrial cleaners. It evaporates quickly and cuts through grease and residue extremely well. Acetone occurs naturally in the environment and in small amounts in the human body. It is highly flammable, and vapours may cause drowsiness or dizziness. When working with acetone, always use it in a well-ventilated area, and never around open flames or sparks.
Is acetone a good cleaner to use before painting?
Generally, no. While acetone is an effective cleaner in certain situations, it is considered too harsh for interior wall cleaning. Acetone can:
- Soften, damage, or dissolve existing paint.
- Dull or strip finishes.
- Damage plastic or synthetic materials.
- Create strong fumes which can be dangerous indoors without proper ventilation.
Because acetone is such an effective cleaner, some homeowners assume it’s great for pre-paint prep. However, acetone is too aggressive for interior walls and usually does more damage than good.
When might acetone be helpful?
There are a few situations where acetone can be useful for cleaning interior walls. It is best used in these targeted scenarios rather than for a general wipe-down, including:
- Removing stubborn adhesive residue (like tape, stickers, or leftover wallpaper glue).
- Degreasing heavy oil, grime, or grease stains, particularly in kitchens or high-traffic areas.
- Removing permanent marker, crayon, or pen marks.
- Removing stubborn scuff marks from furniture or shoes.
Before using acetone, always test in an inconspicuous area, as it can damage or dissolve certain plastics, varnishes, and delicate synthetic materials. Acetone should be used sparingly, and only with proper ventilation to avoid inhaling strong fumes.
What should I use to clean my walls before painting?
For interior wall prep, gentle water-based solutions are recommended over harsh cleaners like acetone. Suitable alternatives include mild dish soap and warm water, a TSP (trisodium phosphate) solution, a diluted vinegar solution, or a mild degreaser.
Let’s take a look at these options:
1. Mild Dish Soap and Warm Water
Mix a few drops of dish soap into a bucket of warm water. Use a soft sponge or microfiber cloth and gently wipe down the walls. Follow up with a clean, damp cloth to remove any soap residue.
2. TSP Solution
TSP is a strong cleaner and is best used for greasy or heavily soiled walls. It can irritate the skin and eyes, so wearing protective gear (like gloves and goggles) is essential. To use, mix 1 part TSP with 20 parts warm water and apply to the walls from bottom to top with a sponge. Scrub and thoroughly rinse with clean water to remove residue.
3. Mild Degreaser
A gentle household degreaser can be used for high-touch areas, such as around light switches, door frames, or handrails. Some examples include Krud Kutter Original or Simple Green All-Purpose Cleaner. Always follow the instructions on the label and dilute the mixture accordingly. Rinse afterwards with a clean cloth.
4. Vinegar and Water
Diluted white vinegar is an effective, non-toxic cleaner for removing grime, grease, and scuff marks from walls. Mix 1/2 cup of vinegar with 2 cups of warm water, along with a few drops of dish soap if necessary. Wipe the solution onto the wall with a soft sponge or cloth and rinse to remove any remaining residue. Let the walls air dry, and the vinegar odour will disappear.
While acetone is a powerful solvent, it is simply too harsh for general wall preparation. It can easily damage existing finishes and poses significant health risks due to its fumes and high flammability. Instead, stick with mild, safer cleaners like dish soap or TSP.
If you’re unsure about the prep process or simply want a flawless finish, consider hiring a residential painter. At Perry Wellington in Winnipeg, we take care of everything from prep to clean-up. Contact us today for a free quote!