Quote Originally Posted by David Lyga View Post
Naval Jelly is sold at most hardware stores and a simple application of it to the corroded area does wonders. Leave it on for about ten minutes and then wipe off with a clean cloth.

First, try this on a tiny part that will not be noticed in case a discoloration is left on the metal. - David Lyga
The metal on the camera that is corroding is magnesium. I would NOT recommend naval jelly; it's for iron and steel!