HOW DO I FIX MY BOOTS?!?

Ok. My Ariat Fatbabies got a small scuff mark. I went online to try to see what to do. I tried putting a small amount of baking soda on a wet washcloth and rubbed gently. It made some very noticable discoloration. I then tried putting petroleum jelly on and it didn't help. I don't have boot polish. What do I do, I have a show on Monday!