I have recently aquired a set of old chips. They are in mixed condition... some are chipped, some have manufacturing defect, some have cig burns, and most need to be cleaned. I would really like to know where they came from, how old they are, casino chips or home chips and how to clean them (or if I should clean them) and if they are worth anything. There are always great answers on here, so any help or direction is appreciated. I'm a relatively new collector, so any advice is welcome. T