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hello, i'm an apprentice carpenter, so to say the least.. ive spent a fair bit of time doing this tedious job. i find that some of the best methods to remove dywall mud from concrete depeneds on two things, how much mud is on the concrete as well as how porous and gritty the concrete is. -->try using an abrasive pad along with a vinegar/water mix in a spraybottle.(half/half) -->use a putty knife, etc to scrape off the large chunks of mud -->razor scrapers work very well, however it will still need to be cleaned with either water or a mixed solution. -->sometimes just an abrasive pad alone will remove the mud -->sanding sponges work great, just dont use them in wet conditions (after spraying a wall, etc, it will clog the sponge..)

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Q: How do I clean drywall compound stains off concrete?
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