Answer: Thank you for your inquiry. It seems that you have a very nice collection of Indian Head cents. The best way to tell recolored pieces is by experience. I am not sure that it is possible at all to give verbal descriptions that would be consistently useful. In my own experience I have evaluated coins on an individual basis using years of experience in doing this. There are many recolored coins that are certified, so that is not an answer either.
Probably the best thing to do before spending a large amount of money on a particular coin would be to have a dealer or someone else check it for you. I have found that Rick Snow of Eagle Eye Coins is very good in this regard, and there are no doubt others.
I hope this helps a bit. Thank you again.