You will want to get some cleaner and conditioner and perhaps some waterproofing for after you clean it. You can also rub out some scratches with your fingers. The Meltonian 170 in the little jar in 170 delicate is colorless and you can use it on any color bag; just be sure to test any product in an unseen area before you do the whole bag.
How do you use it exactly? I bought the Meltonian 170 rubbed it on to my Cambon wallet and nothing changed. I kinda expected the dirt to magically come off haha. Am I doing something wrong?