I take a lot of photos when I am cleaning up old drums and I realized today I never do anything with them.
Here's the before and after on a particularly grungy spot of a white marine pearl 65 Ludwig kit I've been picking away at.
Before:
and after:
Ultimately it all gets covered up by the cymbal mount anyhow:
Not that anyone has asked but I've always achieved modest results with scrubbing bubbles, Novus and Turtle Wax, in that order.