Ok, listen to someone who knows. I have been in record sales for 20 years and in that time I have come across many ways to clean up vinyl and some times greatly reduce the click of scratches, although it is totally impossible to remove scratches completely.
To clean up records to as clean as you can possibly get them, the best substance to use is 'Isopropanol' This is the alcahol base that is used in CD cleaner, record cleaner ect. If you go to a chemists and ask for some and tell them you are using it to clean records with, they may sell it to you in it's purist form. Failing that, use CD cleaner, it does the same job but the mix is weaker so not quite as effective. Isopropanol gets rid of such problems as finger marks, spilt drinks, hiss and minor crackles on vinyl and does not damage vinyl at all, but it MUST NOT be used on acetates or emidiscs as it will completely destroy them to the point of being non playable. The best way to use it is to put the record on a turntable and set the turntable going at 45rpm. Tip a little of the Isopropanol from the inside of the disc to the outside of the disc making a spiral on the record. Now take a clean soft cloth and putting your finger on the label of the record start to wipe the record with the cloth keeping the record turning with the finger on the label. Work from inside to outside pressing down firmly with the cloth and keeping the record spinning with your finger until the record is dry. Now try playing the record and if it is not to your liking, repeat the process.
To remove scratches as much as humanly possible the best way is to wet the tip of your finger with spit and rub as hard as you can over the scratch until your finger starts to burn with the friction, stop and do it again. You will feel and maybe see bits of dirt coming from the record and some from your finger. This process actively rubs the scratch down as if using rubbing compound, but with no damage to the record. Repeat until the best result is met. Another way is to scratch the scratch with your fingernail across the scratch not with it, you will feel the edges of the scratch when you do this and this is what causes the click, If you scratch the edges down with your fingernail, until it feels smoother, this usually reduces the click, but obviously not get rid of the click or the scratch completely.
Believe me, the above methods DO work if done correctly.
Hope this helps.
Steve