This is a great resource on record cleaning. Very long and detailed but has a lot of good info.
I do not have any experience with your problem. When I get a new record into my collection I do a multi stage cleaning.
Record cleaning and realistic expectations
I recently purchased some Audio Intelligence solution #15 enzymatic pre clean to use on my VPI 16.5 prior to my usual cleaning with Disc Doctor cleaning solution followed by 3 distilled water rinses. I picked a record that came from a collection in a particularly moldy house.The record had faint white splotchy marks all over that I assumed were mold. Pretreated with AI #15 for 5 min per AI’s instructions. After cleaning and drying, the record was cleaner, but the splotches remained. Did I do something wrong? Could the splotches be something else?
A second record had inner runout marks I assumed were from the old plastic inner sleeve, but going thru the same process these as well did not clean up as well...Hmmm?
Would an US RCM like a Degritter do a better job?
Thanks for any assistance on this.