I have a 1786 New jersey NJ Copper cent that I would like to add some patina back?

I have a 1786 New jersey NJ Copper cent that I would like to add some patina back? The truth is I found it metal detecting and when I brought it home I cleaned it with a plastic brush and took off most of the patina on the back and god knows what else, the front still has most of the patina but there also some red spots ontop and near mouth of hourse. the date is hard to see not sure if I removed it with the dumb brush but I’m new to this and this is why I made a stupid mistake. If I could get the coin dark again it would look much better .. How can I get this coin to darken faster naturally ?

Don’t think you should do anything do it. Go to a place that deals in old coins. Try to find a place that can give advice as what you should/shouldn’t do.

Ask around where you can find a reputable dealer in coins.

Metal Detecting the Jersey Shore – Ocean City, NJ #3