Letting the knot dry before I go to the next level. I wrap in Saran Wrap before electrical tape on brushes personally. Some good tips on polishing Tom. Neverdull is in my kit still, as is renwax.
There is a load of discoloration around the stamp , but hopefully not to much pitting.
Aluminium is a different alloy for sure, soft, and a pain to keep patina free. I'm thinking white tripoli on a soft cotton wheel would bring out the luster after the wet dry.