ok i acually put it too the test. i took a broken low pro that broke cuz i didnt ride it front first. I used a file and scraped 100 times, and gathered the powder. then i put the wheel in hot boiling water for 1 min, the straight to ice water for like 2 min. i dried it off, let it sit to reach room temp. i re filed it with the same pressure 100 times. much less powder came off. there is room for error here, so its not definitive, but it does seem to work some what.