Anybody using the last record preservative

Let me do a little myth busting here.  There is a guy who wears a chemist smock and hawks ultrasonic record cleaners.  Any of you who have been to a trade show know who I am talking about.  Anyway, he scrubs and scrubs until all the white gunk stops frothing out of the record grooves.  It is quite a process.  He hates records that have been treated with Last because it is next to impossible to remove the stuff according to him.  It seems to bond pretty well- kind of as claimed by the manufacturer.  Next, some time around 1979 or 1980, toward the very end of my years in hifi retail, the rep for Last came into our store and set up a demo as follows:  Two brandy new direct to disc copies of Dave Grusin on Sheffield Records were opened and one was treated with Last and then both were put on identical Dual changers (1219 model if memory serves) and left on repeat for a week plus of continuous play.  Come Saturday a week later to much fanfare and in front of a considerable crowd the two records were compared.  The untreated one was quite noisy, but the treated one was still quiet.  As quiet as a freshly opened copy.  Last sold well at that store from then on, and I for one have used it ever since on literally thousands of records with stellar results.  It is a one time treatment, even if the treated record is later cleaned again and again.  And no treated record has ever  needed more than an occasional re-cleaning.   Oh, by the way, in all the years and all the time I have used Last there has never been one problem with either their bottles or the labels.