Fleshler I always avoided playing an LP twice in a day as the prevailing thinking was as you describe. It is true the vinyl under the stylus is under immense pressure and is described as going liquid (never proven as far as I can tell). The mass of vinyl involved is so small that the surrounding vinyl acts as a heat sink and the temperature returns to normal immediately. I have a tire infrared temperature gauge and can not detect any change in the temperature of the record while playing. I think as long as the record and stylus are clean it is safe to play a record over again if you have too. But who wants to listen to a record twice in a day;-)
"Last" is a joke. It is nothing but freon. You can prove this to yourself easily. With a dropper place a drop of Last on a glass slide and let it evaporate. Put another drop in the same place on the slide and let it evaporate. You can keep doing this a thousand times over and you will never see anything remaining on the slide. Nothing, Nada, Zero. That is how gullible we are. Will freon change the vinyl in any way? Absolutely not. It is totally inert which is one of the reasons it is a great refrigerant.
Lps are Lps. Some are quiet, some not. The best way to keep a quiet collection is do not buy used records. There are exceptions for instance if you are buying the estate of an expired audiophile who had so many records he may have played one once a decade. Make sure he did not buy used records.
"Last" is a joke. It is nothing but freon. You can prove this to yourself easily. With a dropper place a drop of Last on a glass slide and let it evaporate. Put another drop in the same place on the slide and let it evaporate. You can keep doing this a thousand times over and you will never see anything remaining on the slide. Nothing, Nada, Zero. That is how gullible we are. Will freon change the vinyl in any way? Absolutely not. It is totally inert which is one of the reasons it is a great refrigerant.
Lps are Lps. Some are quiet, some not. The best way to keep a quiet collection is do not buy used records. There are exceptions for instance if you are buying the estate of an expired audiophile who had so many records he may have played one once a decade. Make sure he did not buy used records.