(Could've posted here almost more than one year ago, but I was too lazy to find a 5-year old thread, and I don't feel the need to, but now there is such necessity though, as you'll see below.)
I have a Scalextric Digital set, bought quite a few years ago. It comes with 3 licensed GT cars, a lot of track pieces which have a length of 676 cm when put together, and the usual things featured in a Scalextric set. The track pieces, when put together, form an irregular figure '8', with one part of the track overlapping another to form a bridge. Miscellaneous parts on the cars (mirrors, windshield wipers, e.g.) were broken after years of use and a lot of crashes, so only one of the cars is complete. I later got another set, which featured 2 Aston Martins in Gulf livery.
I rebuilt the track earlier for playing, but I noticed the cars weren't running smoothly. At first I thought it's because of the worn out braids, but after replacing the braids with new ones, they still aren't working. I am sure the problem doesn't lie within the cars, as they can still run smoothly when the braids are in contact with the metal parts.
So I'm pretty sure the slightly worn out metal parts on the track are the source of the problem, as they are no longer shiny and have turned dull, which may cause connection problems between the braids and the metal. And now I'm seeking for solutions on how to remove the dull surface from the metal parts of the track.
I've rubbed them before, but it has no use, and it only gives me filthy fingers with grease on them. Normal cloth doesn't seem to work. I've seen polishing and cleaning pads on the Internet before, but I'm not sure if they'll serve the purpose.
And are there any websites that sell Scalextric slot car shells online? Some of my slot cars' bodywork is damaged, and I'm thinking if there is a way to fix that.