I have an old train (+60years)  set that I haven't unpacked in years.  It is a O gauge (three rails per track) and These tracks were subject to corrosion and the pins were rusted and some very hard to keep in the track thus it didn't make a good connection. 

I have seen some newer tracks that seem to be a better quality to alleviate the above problems but I don't have a name or brand of the best product out there.

I would appreciate any suggestions / recommendations for new track and if old tracks can be restored to their original condition.

Thanks