I'm trying to restore my 1966 slingerland WMP snare drum, and I finally found that I can remove the "yellowish" tarnish on WMP finish and the result is fantastic.
1. Using 600/800 grid wet sanding
2. Using 1500 grid wet fine sanding
3. Turtle Rubbing Compound
4. Finish up with SimiChrome metal polish to get shiny look
D' Drummer