I had an old Riverside double given to me in 12ga. It needs alot of work and a stock but will make a good father/son project for us. I notice that the fit and workmanship are a bit below par on this gun and want to clean up a few of the issues. The action is very proud in some areas where the barrels meet. Can the action be filed to match the contour of the barrels? Will it need to be annealed first? Will it need to be hardened after?? The plan is to coin finish the receiver after we are done fitting the action and barrels properly.