Iv used CLR on two old razors a Wade ad Butcher and a Wosty and i never had any problems with it at all. The CLR cleaned it up pretty well and allowed me to make final sanding and polishing moves. Both have been shavers and nother have had any problems yet. that would have been over a month ago. i also use gun oil to keep rust off the blades adn lubricate. both tequniques have been flawless for me.