Smoothing walls before painting is necessary for surfaces previously painted with a gloss or high gloss paint.
How to clean concrete walls before painting.
Protect the floor around the walls with plastic sheeting.
Remove dirt and grease with trisodium phosphate 6 30 per quart concentrate or choose a more earth friendly cleaner like krud kutter s pre paint cleaner 10 for 32 ounces.
Prepare to mop the concrete with a trisodium phosphate solution tsp.
Things that you need to clean before going to the next step of the cleaning times you have to prepare some stuffs.
Spray the wall as necessary.
Slip on a face mask and safety eyewear to protect your respiratory system and eyes from any harsh dusty residue released into the air by the.
A thorough cleaning with a concrete safe cleanser lightens stains and usually removes them completely.
You can and should try applying common detergents directly to the tough spots and scrubbing with a bristle not wire brush.
Scrub the entire wall briskly with a dry stiff bristled scrub brush or a stiff wire brush.
But you may not get far.
Cleaning concrete is a vital first step because the porous surface tends to trap dirt grease and oil.
A soft brush vacuum cleaner hose attachment.
How to prep walls for drylok.
This will catch any drips from the cleaning solution.
I once tried cleaning a concrete garage.
For previously painted water based paint sand with a fine grit sandpaper.
1 spray the entire wall with water to rinse off dust and dirt.
Fill a bucket.
Again wipe away any debris and allow to dry completely.
So how to deal with those stuffs.
For oil based paint a medium grit sandpaper 100 to 150 grit should be used.
The simple things that you can do in your exterior house 1.
Examine the walls.
Dust off the walls with a dry rag to remove loose dirt and dust.