[Vwdiesel] Derek's spray-gun

[Dana Morphew]

Thanks to you both.

Dana

Derek wrote:

> BTW, copper is the opposite of steel when it comes to annealing.  Heat and
> quench will make steel harder and copper softer ...

> > Seems that either technique works on copper:
> > http://www.evergreengardenworks.com/copperwi.htm
> > http://www.ytmag.com/toolt/messages/116257.html
> >
> > Seems rate of cooling won't affect the final hardness (or softness) like
> it does with steel to a big degree, cooling in liquid
> > reduces the surface oxidation.
> >
> > --
> >     Roger