I use Simple Green HD and boiling water all the time. Comes out clean as a whistle and does nothing to the bluing.
People do use chemicals on the bluing with good results, but I choose to use only hot water as I don't like using chemicals inside the house if I don't have to. If I have to, I use the 'green' type if possible. The TSP worked great on stripping the stock's finish and didn't smell, which was a plus for me.




















































