Originally Posted by maniac57
All I would add it this:
DO NOT use Armorall near anything you might paint in the future. The silicone can cause savage fisheyes in any future paint unless cleaned off very aggressively.
I prefer mink oil or saddle soap for leather and vinyl.
Ditto on the Armorall. It has been found to dry out and ruin leather and vinyl. In fact a lot of the products made to make vinyl and leather "look new" contains kerosine or similar petroleum products that will do more harm than good.
Saddle soap and products made especially to clean and condition leather will be your best bet. Those 'car show' products auto parts stores sell aren't very good and give short term results.