Re: Is this a leak or not?

[yd3@nvc.net]

Greetings:

Copper anneals the opposite way of iron/steel.  In a dark room, heat evenly the
copper washer until it just starts to glow and IMMEDIATELY drop it into water. 
This will soften the copper.  After softening, place a piece of 1000 or finer
grit paper on a dead flat surface and rub the washer on it to remove any old
burrs.  If there a alot of burrs or you need to remove some metal, start with
300 and work up to 1000.  I've done this also to brake sealing washers, etc.

Blake