How can i remove what seems to be a mark on a light colour leather chair .I think the mark is something that has come off of a shoe/boot that has been scuffed onto the chair,dont want to go to use anything that will cause more damage than i've already got .
For light cleaning I use some disposable Leather Cleaning wipes (impregnated with almond oil) or for more intense cleaning/treatment, saddle soap.
I would advise you to try cleaning the chair in a spot that wont normally be seen (underneath the chair or maybe under a cushion). Maybe you could try to re-create the damage/mark you describe and then try cleaning it, and see how it's affected.