For cleaning graffiti from walls it's probably best to buy a specialty cleaner. SoSafe Graffiti Cleaner is one brand. Use the green label for painted surfaces and the blue label for brick or concrete surfaces. While pressure washing is the usual method for cleaning graffiti from brick or concrete this can damage wood surfaces.
Or do you mean smoke? If it's really bad, it may require primer then paint but moderate smoke stain can just be covered with paint. Be prepared to do a second coat where necessary
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My niece recently decided to decorate my walls with stickers, and while I appreciate the creativity, the stickers are now causing a bit of a headache. Every time I tr...
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Wash, prime and paint the walls.
Try a Heavy Duty Mr. Clean Magic Eraser followed by a wipe down with Windex
Are you asking about soot, or are you needing to cover up obscene graffiti?
Here is a website with instructions on cleaning soot: https://www.wikihow.com/Clean-Smoke-Off-of-a-Ceiling
For cleaning graffiti from walls it's probably best to buy a specialty cleaner. SoSafe Graffiti Cleaner is one brand. Use the green label for painted surfaces and the blue label for brick or concrete surfaces. While pressure washing is the usual method for cleaning graffiti from brick or concrete this can damage wood surfaces.
Magic erasers work great.
Or do you mean smoke? If it's really bad, it may require primer then paint but moderate smoke stain can just be covered with paint. Be prepared to do a second coat where necessary