I'm buying a set of 4 chairs from FB marketplace but there's one chair that has scuffs. They said they had a painter come and when he was moving his ladder around it lightly scraped the seat and thats why it's there. I love the set and want it but I'll have to fix this one. I have no idea where to start with fixing leather and I'd rather not pay an arm and leg. I want to learn to do it myself. Any advice?