PSA: My old floor sander left a weird shadow I couldn't fix for days
I was refinishing the oak floors in our front room and hit a snag. My old drum sander, a Clarke EZ-8 I got used, kept leaving a faint, wavy shadow in the middle of each board after the first sanding pass. It wasn't a gouge, just a dull patch that wouldn't go away no matter how many times I went over it. I spent two whole afternoons trying different angles and speeds, thinking I had ruined the wood. Finally, I took a break and really looked at the sanding drum in the light. The paper had worn down almost smooth in a perfect strip right in the center, but the edges were still sharp. I was basically polishing the wood, not cutting it. I learned you have to check and change that center strip of paper way more often than you think, even if the edges look okay. Has anyone else run into this kind of sneaky wear pattern with an older machine?