Cleaning the green off buckles, and waxing canvas

[NapeSticksToKids]

I recently got a NOS ARVN rucksack, and all the metal parts have the green corrosion on the brass. I tried some baking soda and water and it did absolutely nothing. My plan was to remove all the green and then repaint them as best I could. I don't really care about the collectibility because I bought this pack as a new pack so that I could wear it in myself, its my new pack for tromping around in the woods. I am also treating the canvas with otter wax (havent gotten to it yet, wanted to clean buckles first) to get it water repellent. Otter wax has no petroleum products, is there any reason it would be bad to apply?

[mruiz]

Use a brass brush. recommended wax after cleaning. I was told no grease or petroleum products.