On Sat, 02 May 2009 19:18:24 -0400, jeff_wisnia
wrote:

I use the upside down trick too, but before putting the lid in place I
hold the tilted can right next to the exhaust pipe of an idling car to
fill it with oxygen-less gasses, then quickly slap the lid on and pound
it closed.

A professional painter showed me that technique almost 60 years ago. G

Wow! What a GREAT tip, very memorable!