Garnet Lapping Powder – 1/4 lb.

Garnet Lapping Compound is the best on the market for lapping valves and slides. It is stored and shipped as a dry powder so you can select oil or water for mixing.

If using water: use liquid soap and water.

If using oil: use a medium-weight oil (e.g. 3-in-1 or Key Oil). If the oil is too heavy it can bind up the key movement in the tube. If the oil is too light it won’t distribute enough of the grit into the tube.