I had a set of Bosendorfer casters that were frozen as well. I boiled them in vinegar to soften the unwanted goo. While still hot I dipped them in water and started wiping off the rest of the crud. I then followed up with a good couple of hours of buffing. Replacing casters definitely takes less time than trying to save them. -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://www.moypiano.com/ptg/pianotech.php/attachments/20111223/413c684b/attachment.htm>
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