"HeyBub" wrote
Oxygen is the enemy of unused paint. Here are some tips:

* Don't paint out of the can. Pour paint into another container and
re-seal the can.
* When finished painting, return the unused paint to the can, then - pay
attention here - EXHALE three times into the can. This replaces most of
the oxygen with carbon dioxide.
* Use a plastic bag as your friend suggested. It acts like a gasket around
the edges.
* Store the can upside down. Any remaining oxygen will cause a thin film
to form on what will be the bottom of the paint next time you open the
can.
* Make sure the lid is on tightly. Else some paint will leak out, firmly
attaching the lid to the shelf such that when you grab the can, the lid
stays on the shelf, the remaining paint plops to the floor, and you have
an empty can in your hand.

And be sure that a dumb blonde doesn't get a hold of these instructions.
;-)

Max