Eric Sedletzky
Contributor
Soak it in a citric acid bath and that ferrous corrosion will come off without eating up any stainless.Took a dive with my rebuilt mk5/109 - and I apparently survived! Thanks to the assistance I got here, and the helpful videos made by the vintage double hose people. Good times!
I did find some corrosion on the lever, visible in the attached photos:
View attachment 920982
View attachment 920983
probably due to being stored with a bit of salt captured at the interface between the lever and diaphragm disk. I cleaned the area up and applied a bit of silicone grease to hopefully prevent corrosion.
Any tips on how to prevent this kind of thing? I generally rinse gear in fresh water, and give them some opportunity to dry out.
Then just soak and rinse really well if you use it in the ocean.