chevrolet - Lapping valves by hand - does the compound have to be cleaned off? - Motor Vehicle Maintenance & Repair Stack Exchange

I'm hand-lapping valves on the LS1. This is probably a silly question, but I just wanted to confirm that I have to wipe off the lapping compound prior to the hydro test.

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valves leak more after lapping?? - LS1TECH - Camaro and Firebird

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valves leak more after lapping?? - LS1TECH - Camaro and Firebird