Well this should get the purists reaching for their valium and oxygen masks!!
But..... I have made a couple of heads look good as new by first cleaning the Tolex with mild soap and water and a stiff brush (like a nail brush) and then............ and then...........
Boot Polish (black of course)
Yes it works a treat.
Work it into the grain with a brush then buff it up and it restores the Tolex to almost as-new condition. It all depends on how scuffed it is in the first place of course but it definitely makes it look better.
Try a small area underneath first to see if you like the result, you will also find that a few applications is better than trying to get it to look right in one go.