[mwe-maxxowner]

I have begun successfully waterproofing escs with mg acrylic conformal coating. I've also used corrosion x, but conformal coating is more permanent, and less messy, so I like it better.

I think that is your best bet. A 14$ bottle will last you the rest of your time in the hobby, it works well and is easy to Use. I have a mmp, et3s, and old non waterproof sidewinder that can vouch for it.