easy. Oil based paint is very durable when cured. This makes it "easy" to sand because the paint powders up quickly unlike latex paint which remains more flexible therefor gumming up normal sandpaper.
It is unusual to find interior walls coated with an oil based paint, it is normally found on interior trim, doors, and cabinetry. If you are wanting to paint over the oil based paint, you can use a liquid de-glosser to prep the walls and paint directly over the oil. If it is a major color change, use a primer tinted 50 percent strength of the final color. Like they said-"easy"
You have a problem with the drywall. It is not a problem with the paint. Most likely it is moisture or some kind of contamination on the wall that is pulling it off the drywall. Another issue to consider is if you have too many coats on the wall the weight of all the coats of paint can cause stress and pull everything off. If the paint is not peeling everywhere and is just peeling in certain places the paint did not fail. (Paint does not choose where it will peel and where it will adhere).
It can be sand blasted (at a cost) Burned off (hard work and can if the paint is old be bad for health) brushed or scrapped (hard work as not all will come off) However, you can paint a thinned down PVA over the oil based pain and then add a high quality wall paint 50 /50 (water and paint ) followed by 100% paint once dried.
Yes it does, it also makes a lot of mess ,
A good oil based primer, then an oil based concrete paint.
Wash a small area with a solution of houshold detergent and warm water. Rinse well and dry it, then soak a soft rag in alcohol and rub it back and forth over the area. If paint comes off, it's latex paint and you can use another coat of latex paint. If the paint doesn't come off, it's oil-based, an oil-based primer is a must
Rub a rag with thinner on the wall, if paint softens or comes off onto rag it's oil based
how can I tell the difference between acrylic and oil paint on my wall?
It will if you lightly sand the oil surface first.
You have a problem with the drywall. It is not a problem with the paint. Most likely it is moisture or some kind of contamination on the wall that is pulling it off the drywall. Another issue to consider is if you have too many coats on the wall the weight of all the coats of paint can cause stress and pull everything off. If the paint is not peeling everywhere and is just peeling in certain places the paint did not fail. (Paint does not choose where it will peel and where it will adhere).
There are a number of ways to do this depending upon the size of the stain, as well as the type of wall. If for example the wall is paint on plaster, then an oil based cleaner will work excellently. In lue of a good oil based cleaner, then gasoline will even work. If the wall is made of something like concrete or metal, then shot blasing techniques such as sand blasting may be the best option.
It will if you lightly sand the oil surface first.
It can be sand blasted (at a cost) Burned off (hard work and can if the paint is old be bad for health) brushed or scrapped (hard work as not all will come off) However, you can paint a thinned down PVA over the oil based pain and then add a high quality wall paint 50 /50 (water and paint ) followed by 100% paint once dried.
Yes it does, it also makes a lot of mess ,
You need to rough up the surface of the oil paint with sand paper or a light coat of stripper.
A good oil based primer, then an oil based concrete paint.
Use a good primer, then you don't need to sand.
soap