[TheForge] sealing copper pee patina

[Woolley]

lee robbins wrote:
> Thanks for the copper info. i wondered about the
> patina after the cat pee information on steel. I just
> got some tung oil for my tool handles and have a
> memory of someone using it on steel. Will that also
> seal the copper patina more durably than say
> polyurethane  or wax? Just letter openers.
>
> Lee
>
>
>   
I use tung oil on steel.  Multiple coats will help but certainly not as 
tough polyurethane.  You can wax a tung oil finish.