I thought it might be nice to have a focal point of what works on restoring oxidized stems. Please list the pros and cons, how difficult it is, etc. For me I have only used the soaking in bleach method.
Pros of bleach soak:
Its easy - just cover the important stuff with vaseline and soak.
It does a good job.
You have to cover the logo and important stuff or you will ruin them.
You still have work to do after the soak, sanding and polishing to get the shine back.
It takes time for the bleach to do its work.
Please add your experiences and by all means add to the bleach pros and cons as well.