Agreed - the wisdom and logic of your explanation is irrefutable -- doesn't hurt to have test data to support it too
My point was more to remind folks that sealing a sheath doesn't guarantee waterproofing, nor does it replace the need to clean up after use. Just as there are is no such thing as rustproof steel (only rust-resistant), sealing a leather sheath provides water-resistance, not waterproofing. I know we've had this discussion here before, just bears repeating once in a while for any newcomers (and a reminder to Seasoned Minds like mine
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Mike