About a million years ago I played trumpet. I immediately recognized the bottle of oil on the table that Bob used. I didn't read the bottle, but I identified it as trumpet valve oil. Trumpet valve oil and trombone slide oil are the same thing. Yes, they are mineral oils that are very thin (relatively speaking). The next time I have to go into a music store I plan on getting a bottle.
Incidentally, I've also heard that the plastic pot scrubbers are also good fingerboard cleaners. I've never tried, but they are supposed to work as good as 0000 steel wool without leaving any steel bits and pieces laying around to scratch your guitar top. Just a thought.
David
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