[Vwdiesel] Derek's spray-gun

[Roger Brown]

Dana Morphew wrote:
>
> Won't that make it hard? Whenever I grind steel and want to retain
> hardness (and to avoid getting "branded") I quench it in the water can.
> Wouldn't a slow cool down, without drafts, soften the metal?

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