I am new to the board and this is my first post.  I live in Southeast VA and love to hunt for teeth.  Most of my hunting is done along all of our rivers around here.  I dive some spots, walk the beach in others, and lastly the most productive method is digging in the rivers gravel beds.  Many of the bigger megs that I find along the top layer of gravel are nearly pitch black wih tannic acid stains.  My best spot is now a freshwater river full of leaves which cause the stains.  I was just curious to see if anyone has any methods of removing these stains.  I have used a 50-50 mix of lemon juice and water and let the tooth soak in there and this seems to be the best I have found.  I have noticed that on the tougher stains the tooth may need to soak over night and occassionally this also fades out the color in the root, which is what I am trying to avoid.  Anyone got any tips?  I bought a dremel last night with the polishing kit, but that seems to be to brutal of a  method, plus is creates a smell like the denitisit office (I practiced on some of my partials)