These are delicious. You can’t make them and eat them today, but if you make them today in a couple of weeks you are going to get a treat for your mouth and for your health.
If a white scum appears on top it’s ok. Just skim it off and enjoy your beans. If you can keep your beans in the refrigerator or a cold cellar it will help keep the scum off. Don’t refrigerate for about two weeks though to get the bacteria really growing. If it smells like pickles and sour they are good to eat. If they smell really wrong and disgusting they are bad.