If you are like me and you sometimes can't see the shot flying and you wonder where your hitting. Take some of those vinegared balls and clean them good with acetone then get a can of that upside down marking paint in dayglow orange. I used a plastic lid and put a single layer of balls in the bottom. Spray the balls good and use a paint stirring stick and stir them good then give them another coat. Keep this up until they are well coated. Then every five minutes or so stir them again untill they start to dry and quit sticking together. After they started to dry I dumped them out on a flat surfac covered in plastic and spread them out so they weren't touching then let them completly dry. You will be amazed at how long the paint will last. I still have some left from when I did this in 09.
You can see them fly better than the white tracers and they stick out like a sore thumb on the ground. If you shoot around grass this is a good way to keep track of them.
Now I have to quit this nonsence and get back to work.