Pesh Kabz for comment

[Saracen]

Originally Posted by Silver John

Regarding the use of coffee, it was a first for me and something that I learned about on this site. I believe coffee contains tannic acid...

Thank you for the detailed explanation of etching with coffee. I read somewhere (maybe here) that even Coca-Cola is used for etching in hotel conditions, but I have never come across information about the use of coffee for this. I'll check this method sometime).

PS: I probably drink too much coffee every day