Hello everyone!
I just purchased this quite expensive card holder (secrid) and I noticed the edges are bothering me.
I can't find much information from the supplier about what kind of leather it is, but I suspect that it is chrome tanned.
Is there a way to burnish said leather? I'm a little sacred to act and do damage...

This is the result I've come back with. I think I can get it to where I want it to be using this method :) I used some Tokonole to give it a light burnish (flattening it all down). Then used the Fiebings Edge Kote.
I apologise for the pictures I've been uploading, they are terrible! My phone is clearly outdated haha.
Thanking everybody for commenting :)