Treating records with LAST preservative

I go with the "If it ain't broke don't fix it" crowd.
Billions? of records have never seen Last. And most of the ones that avoid: being scratched (Last ain't gonna help that), and being played on a TT with a really damaged Cartridge (Last ain't gonna protect from that either) are in good shape.
Keep 'em clean and use a good cart with a perfect needle and your records will last without Last.

An interesting "mixed bag" of opinions here. To add one more voice, I've been using LAST preservative on my vinyl records for about 30 years, and have had uniformly good results with it. Of course, I thoroughly wet-clean my LP's first, using a Nitty Gritty record cleaning machine, and then apply LAST. During the past several years, I've sold about 1/3 of my record collection to people who frequent Audiogon, and nearly every one of them has written me to comment about the excellent condition of the records. The great majority of those LP's had been treated with LAST.

My experience is identical to Sdcampbell. Of my (approx.) 6000 LP’s there are only a hand full that are not treated with LAST.

I like the product and in comparisons with Groove Glide, preferred LAST.

I think LAST is an excellent product. I started using it in the 80's if memory serves. Absolutely no problems or issues on records that have been LAST treated for about 20 something years now.

I also use and would recommend their stylus cleaner.

Have Fun.

Perhaps, to a certain degree it depends on vinyl formulation. I am mostly interested in late 60s original American pressings and 70s original Japanese pressings but also some British from 70s and 90s.I do not intend to play them much if at all and just want to pass them on to my son.So, I would like to preserve the records for the next,say,70 years.My concern is that once it's done with the LAST it cannot be undone.