Q: Have you ever applied stain using a buffer? If so, have you ever applied it on a water-popped floor?
A: I’m well aware of the concept you mention. However, I can’t even imagine how it could work on a water popped floor. The buffing and commotion would close the popped grain. I don’t thing there is a better way to apply stain than on hands and knees with a rag and buff off with a carpet pad if you have them. I tried a part of a room once buffing on stain. I didn’t like it. It was golden brown. Stick with what works. You have ultimate control on your hands and knees with a rag.