I've been using a BlueBerry to thin my zirconia margins. They work nice but a little pricey . Today I tried one of my Vident flexible diamond disc that I use to use when doing foiled laminates. Remember those ? Anyway , worked great. Used it for the bulk work and then just a little cleanup with a white rubber wheel. I'll have to see how long they last.
Last a long time. The smaller sizes are good too.
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