I have a black metal and lacquered wood long gun that was found in a freshwater body of water. The Officer who recovered the firearm collected enough lake water to keep the gun submerged until we are able to process it. Our Firearms Unit will be waiting to receive it immediately afterwards so they can oil it to prevent rusting.
It has been a long time since my latent processing training. Is there anything newer, shinier, more effective than the traditional methods from 10 or 20 years ago?