War of 1812 shoulder buckle

[can_slaw]

What is the best way to clean this brass plate, and then preserve it without losing the petina?


This relic is very special to me, and I do not want to chance messing it up.

 

[Iron Patch]

Looks pretty good as is. When you say cleaning, is there dirt still on it?

 

[can_slaw]

Looks pretty good as is. When you say cleaning, is there dirt still on it?

Yes there was. I did get some advice on the side to only use warm water and soap, which i did. Turned out great!!