I've managed sometimes to mask light scratches with car polish but choose a really soft cloth to do so and remember to always polish from the center to the edge.
But if you borrow the same disks over and over they might get deeper scratches with time. I know about it as i rent DVD. Now i've no problem with the rental company i'm in, but the former company i had choosen seems not to check discs before sending them again to another customer and over a year i received 2 or 3 discs with reading issues, but again it's commercial DVD, not DVD-R/+R.
Else like Goudo i can only advise you to backup the DVD you borrow, for this you have 3 solutions :
- use cheap, yet reliable media and back them all.
- use more costly DVD-R TDK Scratchproof for all your new discs.
- buy some DVD+RW TDK ScratchProof and use them to borrow with your friends (you keep the original unscratched disc and give them the almost unscratchable disc).
See this thread for more about most durable media :
Certainly price will be an issue with ScratchProof disc, but if you want i'll show you some scratch test i've made with kitchen grade steel wool which looks more than convincing to me:iagree:
Let me know if you want to see...