I have a Sheaffer silver plated pen where the cap is slightly darker (plating loss?) near it's base than the barrel, which is still bright and shiny.

I've been looking at different ways of sliver replating for the bottom of the cap. Has anyone ever done such a thing? Please can you tell me what method you chose? Painting on some silver plating liquid, using a metal plate, or using a sliver plating bath? I would love to know all about your results. Thanks.