Anybody using the last record preservative

There are three possible answers that I can think of: 1)  The act of scrubbing the records in the application process for LAST is quite rigorous and that can remove crap in the groove of new records.  I actually clean the records thoroughly before applying the LAST because I don't want to be rubbing hard with abrasive crap in the groove.

2) The second thing is that, after treatment, the records feel smoother (lower friction) when running any kind of brush against the groove, this less abrasive surface might reduce production of noise.

3) The lower friction means lower build up static electricity when the stylus tracks the groove reducing both attraction of dust and the noise generated by static discharge jostling the stylus.

Last is supposed to reduce friction between the vinyl and the stylus.  Several such record treatments are supposed to do the same. The old "Sound Guard" was a dry lubricant designed for the same purpose. 

Whether any of these products work to reduce wear is something I don't know if this has been demonstrated.  When i comes to long-term effect, it is probably even harder to tell.  How long does one wait in such a comparison?  Could the product ultimately reduce record life if it unfavorably alters the record surface in the very long term?  So far, records I have treated with LAST or Sound Guard are in good condition, but, so too are records that have not been treated.

I wouldn't do something based on someone else doing it on youtube.  A lubricant that is wet and sticky will hold on to dust and any other crap that falls on the record and that cannot be good.  Last is just the opposite.  It is dry and slippery and reduces static charge so the record is less likely to attract dust.  

There is a lot of experts that claim that vinyl records do not have plasticizers that can be extracted by alcohol and so it is safe to use it on records.  I play it safe and use cleaners that are either free of alcohol or use low concentration alcohol.