If you buy a simple loupe, like the type used for coins, you can look right into the grooves and see what the issues are. Takes a little practice and usually doesn't help to fix the problems, just helps to know when to give up.
@Airhead started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
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If you buy a simple loupe, like the type used for coins, you can look right into the grooves and see what the issues are. Takes a little practice and usually doesn't help to fix the problems, just helps to know when to give up.