how do you get interior paint off indoor concrete
6. Clean the concrete surface. Use a power or pressure washer to remove all traces of the paint stripper. If you have removed paint drops or drips, cleaning the concrete can avoid leaving clean spots on the surface.. Scrape the mixture off. The paint thinner should have done most of the work for you, allowing you to remove most of the paint by simply scraping the mixture off with a hard plastic scraper. Add a second layer of mixture if there is remaining paint, and repeat the process.