We're repeating Joe's story under its own headline, which he posted as a comment under the item "Record Restore picks up where Ultrasonic leaves off".
I received a sample sachet of Record Restore from a local Brisbane Hifi shop, Audio Tailor. Somewhat dismissive of the products' claims I had put it on a shelf and forgotten about it. My vinyl hobby is relatively recent thanks to my daughter. Starting about 4 years ago she started bringing home the nastiest dirtiest cheapest used LPs and so I took it upon myself to clean and repair them, reasonably successfully too. Then I started buying cheap nasty records also, then expensive ones, upgrading hi-fi gear etc... So I was no novice to grubby records when my sister in Canada sent me a second hand 1969 copy of The Band. A great album, the record appeared in decent shape but its condition was such that it was unlistenable; loud hissing and crackling, snapping and popping. It was Bad. Even worse I was unable to recover it using my usual tricks of washing, wet playing and toothbrush scrubbing. Nothing I did would improve the playback. Thoroughly disappointed I wrote it off as kaput, N.F.G, but kept it in my collection because, you know - sister gift. Until the day I'm giving some disks a spin, pulled out The Band and remembered the sachet of 'snake oil' from the Hi-fi shop. With nothing to lose I gave it a go, followed the directions and was shocked at the results. It was now a VG record - minimum. Like when transitioning your car from a bad washboard gravel road to good bitumen, the hiss and clicks, snaps and pops were gone. Now there was only smooth sound from a great record. It did what it said, Record Restore Works. Thank you Secret Chord Analogue.