corrosion on MSD reluctor

I noticed when I removed my MSD ignition that there is a build up of corrosion on the reluctor. The car sat for almost 10 years, and while compression is good and it runs well at about 15 advance, I’m wondering if anybody has seen or experienced this and if so, how to clean it without taking the whole thing apart. A3DC4BF3-E36F-4519-8220-D679AA1BE588.jpeg