Roger wrote:
I don't know what the reasoning is for storing cans of paint upside down.

The reason comes from the same school of thought which says that an
unopened
container of cottage cheese will last longer if placed upside down in the
refrigerator. This idea, in turn, is perpetuated by the same people who
think you should hold your breath when you pass by a cemetery.


Storing paint upside down has some pretty credible adherents, including lots
of self help sites, university extensions, and painters. It also works for
me. Turns out paint is a much better seal, when in contact with the lid,
than an ill-fitting metal-to-metal can lid exposed to the air.. Just check
on google under phrase :
paint lasts longer "upside down"



I think paint lasts longer than the container - can gets rusty and
crumbles into the paint when opened. I have transferred paint to jars,
but that runs rish of it breaking. Have heard DIY tips to lay plastic
wrap over the surface of the paint before closing the can to prevent
drying of surface.