Andy G

you can use the polish and buf it back up to prevent it coming off on your clothes and then get some sealent for leather and apply that for a more perm fix, either that or keep polishing it up.

But best to give that side of the seat loads of leather treatment/cleaner/hide food and that'll keep it supple and keep the wear down. So the leather will stay good and then you only have the colour fade to worry about!