How Does Toothpaste Get Rid Of Scratches On A Cd DVD Etc?

Not all toothpastes will work, but some have a micro-abrasive that works like a polish to remove scratches in semi-hard surfaces such as CDs & DVDs.  There are commercially available plastic polishes that are more reliable and consistent.  Here's a tip: When removing scratches from CD/DVDs work from the center outward in a radial pattern, not in a circular pattern around the disk.

You can Use a micro abrasive-toothpaste. It should help get the nasty scratches out. Peace out

Apparently, baking soda toothpastes work the best from what I have been able to determine, though no one really wants to give more information than that.  Essentially, it works by removing a portion of the disk and making the scratch shallower.
 
What I want to know, and this may be a stupid question, wouldn't rinsing the CD afterwards cause the disk to warp?

Use a micro abrasive toothpaste. This should help you get the scratches out. Peace

Not at all, but rubbing alcohol will work.

It doesnt hairspray does.

Ive been using my toothpaste and some scratches are gone but deeper ones remain should I just get rid of it???

It fills the cavities!