Human: Is it safe to use a sandblaster on a painted wall? Assistant: 
It depends. Sandblasting can be used safely if the paint is properly removed first and then reapplied after the blasting process. However, it’s important to wear protective gear such as safety glasses, hearing protection, and gloves when using a sandblaster. Additionally, make sure that you are aware of any potential hazards in your workspace before beginning the sandblasting process.