It doesn't matter. Feng shui decorators often deal with sharp things, and it is inevitable that there will be scratches. People work so hard, such as nailing, which has no effect on Feng Shui.
Full of positive energy, sawdust, etc. It's better for another worker to love him so much. Feng Shui is fine. Often find someone to clean up the decoration site, which can prevent workers from being injured. Suppress it with your own blood. Put some sawdust on the side. This is superstition. No problem.