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The 600 is fine for removing chips but as Bob said the 1k will work easy enough. As you found out a dremel is ott for reprofiling a heal, again as Bob said a diamond hone works perfectly.

I have...

Buy once, cry once. I went through a bunch of cheap loupes, false economy, ended up getting a Belomo. Should have brought one in the first place. Same as someone buying 5 different 1k hones and not...