I have an issue where I bought a sterling silver salt cauldron which has quite an intricate, fairly deep pattern. in the depths of this pattern is what I believe to be the remains of some sort of silver polish. It is white in colour.
What is the best way to remove this?
I am hesitant to use any type of silver cleaning solution or chemical etc as the piece is 260+ years old and I really do not want to damage it.
The below is just to show the pattern and depth of the engraving etc, the polish residue in question is not all that noticeable in the pic.