Thank you for the advice Peter, I was curious how hard/inconvenient it was
to tin the wire in place since we don't have a tinning pot.  I didn't have
any bare copper wire handy to try it out.
That's exactly what I was trying to figure out.

Chip

> The solderability of copper wire can be badly compromised by 
> storage. You can still use it but it will have to be tinned 
> (the ends) before use, probably using a tinning pot. Tinning 
> in place (on a board) will likely lift of the copper patterns 
> by the time the tinning took place. 
 
> On the other hand, if you would use the wire for crimping or 
> punchdown purposes the issue would be moot (these methods 
> remove the oxide from the copper wire).
> 
> Peter
> 


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