You ll want a high shine for clear sealant and stain.
Sanding concrete wall before painting.
You must choose the appropriate type of concrete paint determine if the wall is sealed from moisture and apply primer prior to painting the wall.
Then sand horizontally along the baseboard and ceiling.
Don t put a lot of pressure on the sanding.
If you do end up sanding again don t forget to sweep again too.
Smoothing walls before painting is necessary for surfaces previously painted with a gloss or high gloss paint.
After a few minutes the concrete will begin to have a slight luster.
Refinishing floors before painting walls pros.
Again wipe away any debris and allow to dry completely.
Sand any areas where the paint failed to adhere.
Looking for feed back on these four options.
For previously painted water based paint sand with a fine grit sandpaper.
For oil based paint a medium grit sandpaper 100 to 150 grit should be used.
Sand the walls from the baseboard to the ceiling with fine grit sanding paper on a sanding pole.
Diamond head concrete.
Painting a concrete wall can spruce up an area or make it blend in with the rest of the area s décor.
Dust from floor sanding will not damage newly painted walls.
They aren t dry wall smooth but don t have an interesting pattern either instead i m left with a random scale like texture around the room with some areas worse than others.
Apply a second and final coat of paint to the concrete.
Sanding walls before painting for the best results use a good quality sandpaper i like 3m s pro grade advanced sandpaper available here and a sanding block this one is the best i ve found.
However there are some things to consider when painting a concrete wall.
Easier to match the wall color to the floor than the opposite.
My walls are solid 4 thick concrete slabs.
It is vital for the process to be done carefully.
Press the grinder to the wall and begin applying firm pressure.
Sanding a concrete floor helps level its surface and is a common practice before painting it.
Move the grinder up and down and back and forth across the wall.
Decordezine gives the steps for sanding concrete floors along with the tools and preparation needed for the whole process.
Scuff sanding is also the first step in preparing newly cured concrete for painting.