| if you insist on trying to do a very little lapping to free up your valves - use a non-gel type tooth paste. go in from the bottom of the valve and use the corresponding valve in each each valve casing. like Robert said -let the trained tech do it, but if you do it ,tooth paste works well for the amateur.[it takes off very little but you can still mess up a horn] old geezer Dave
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L.A.Benge 2ML 16389
L.A.Benge 2MLP 11745
K- Allmen 1414
Yamaha 231 Flugel 15383
Olds Amb. Cornet 50734 |