I wonder if the demonstration @billstevenson described put the records in question to more of a test than normal play. The data on vinyl recovery after play is scant. I don't use LAST, but there are plenty of records I've purchased over the years, some as part of collections, that were treated. I've had no issues with any of those.
Since LAST has been around a while, before RCMs were in common use, was the practice to treat the record when new, before playing (or cleaning)?
Most of the records I've been buying for the last several decades are not new. But, some new records that I do buy seem to need a play, even after cleaning, to settle in; whether that's the result of no dehorning or something else, such records tend to be quieter after an initial play. Perhaps that doesn't matter in the use of the LAST. Do those who use LAST apply it to used records or records that have been played?
Since LAST has been around a while, before RCMs were in common use, was the practice to treat the record when new, before playing (or cleaning)?
Most of the records I've been buying for the last several decades are not new. But, some new records that I do buy seem to need a play, even after cleaning, to settle in; whether that's the result of no dehorning or something else, such records tend to be quieter after an initial play. Perhaps that doesn't matter in the use of the LAST. Do those who use LAST apply it to used records or records that have been played?