It's hard to say, because I only used such liquid systems very briefly in the 70s and 80s and can't remember which discs it was ever used on.

But, I have used the VC 2 Alu to bring flea market records and those that went through hard times on cheap turntables in a lively youth at the end of the 60s/beginning of the 70s from 'unplayable' to 'near mint', for which the Knosti no longer had any effect and which I had already given up on. I therefore assume that the Pro-ject can also cope with these residues, as they do not contain defects per se, but only dirt.

The device is super and I would never give it away. If you love your discs and see them as more than just a slightly anachronistic sound carrier system (and also have a high-quality phono line), you can't get around a device like this. Nothing, but nothing, comes close to this machine in terms of effectiveness. Be sure to use the recommended liquid (in my case best diluted 15:1 with Aqua Dest).

If a pane is not damaged, no matter how dirty it is, it will be fine after a thorough cleaning. In the case of heavy soiling, let the cleaning fluid soak in for 1 minute before vacuuming and apply and distribute it for several revolutions with the enclosed goat hair brush using light pressure. In both directions of rotation.

I have never played LPs wet, so I have no experience. But I can agree with Anonymous' answer without reservation.

I know the problem, I have a lot of classical records that have been played wet. Cleaning once does not normally help 100%. The cleaning fluid must have a temperature of at least 40°C, then let it soak in for about 1 minute and then vacuum it off green. You will certainly hear the difference. I haven't managed to get rid of it completely, i.e. until the last crackling sound, but it gets a little better with each subsequent cleaning. The device is rather loud, but I wouldn't give it away again :-)

Thank you for the prompt reply. I will give it a try.