Last summer my efforts along these lines produced no tangible results at Fort McNair, DC and the Washington Navy Yard. The only real progress I think I made then was to get the US Naval Academy to institute a funded cannon conservation program which runs parallel to their monument restoration efforts.
I was trying to do too much at once, so what I'm doing this year is to focus on the Washington Navy Yard, specifically the world-class collection of (largely) Napoleonic bronze trophy cannons in Leutze Park.
Step one of the renewed effort was to generate awareness of the issue. To do that, I've put a series of six videos on you-tube, featuring close-up video and descriptions of the cannons, highlighting the ongoing corrosion damage to these priceless artifacts.
If you know anyone who may be in a position to help motivate the Navy to fix this problem, please enlist their help. If they happen to be a US Navy admiral, active or retired, or a congressman or senator, they're an excellent candidate.
Here are links to the videos. I'm listing them in reverse order since I think most people would rate the the higher-numbered parts as more succinct and more interesting. Please pardon the narrator's voice, some have compared it to that of cartoon character Homer Simpson, or actor Wilfred Brimley; we make do with what's available.