Cleaning and loosening advice please?

[Uncle Bertie]

Originally Posted by mariusgmioc

The first one is a Japanese Tanto. Have no idea about the second one.

For cleaning, in the first stage, I would use WD40, White Spirit and a hard brush for removing the gunk.

Good luck!

Thanks, i now have a follow up question - I can see areas on the tanto where the bare metal is showing - is this what I need to get back to, or could there be paint or another layer of plating under the greeny gunk?