To get back to your question, unless you donate the guns to a museum, the only recourse you currenlty have is to strip them down for parts and cut the receiver. There is no and's/if's or but' about it.
Try Van's Gun Blue. Clean the metal and you can touch up your gun and it looks great. I have also used this product on entire guns that I have stripped down, removed old bluing and cleaned the metal with solvent. This product works great and is about $40.00 a quart at the gunshows - resable...