Copper sink clarification
Can someone tell me if I have this right please?
Copper is a shiny "coppery" color. With time it oxidizes. This state is not permanent and acid or other reactions will return the metal to the shiny state, sometimes not evenly.
The evenness of the oxidized state can be maintained by oxidizing, or "burnishing" (is that the meaning of "burnish" in this context?) the metal, and then sealing it 'in place'. As long as the sealant is in place preventing oxygen from further oxidizing the metal, the color will remain at the stage it was in when "burnished". The sealant can and will scratch or degrade with time, leaving the metal vulnerable again to return of the 'shiny-ness'.
So when people market sinks with different 'patinas', that means they have sealed in a particular look from within the course of oxidation. Should that sealant wear away the patina would be gone -- that is, there is nothing inherent about a certain patina given to a sink -- it's not like, say, paint (OK, which also wears away, but still)...
Now -- those sealants, there are different kinds, right? There seems, for example, to be a "wax" but also other products -- are they all doing essentially the same thing, halting the oxidation process at a given stage? Or do these impart different qualities; does one care what the sink has been sealed with?
Finally, is this correct?: Because nothing is happening to the metal to change it inherently, one could try a sink unsealed for a while and see if it was OK, but if not, then go through the process of burnishing and sealing it later on -- nothing would be lost by not doing this right away.
Am I close please?
Thanks, wise ones!
Here is a link that might be useful: fyi, the sink I'm interested in...