Painters are often afraid of falling on the wall, which is a possibility. Adding talcum powder will make the problem worse. What is talcum powder? It is to add latex paint to the wall to make it more exquisite. Isn't that mixing sand into it? You may be mistaken. You've never done this before, and you've never cut corners or stolen like this. After adding talcum powder, the wall will be as rough as sandpaper, and even the worst painter will not do it.