On 9/26/2012 4:31 PM, Oren wrote:
On Wed, 26 Sep 2012 14:40:45 -0400, "Don Phillipson"
wrote:

One method is to store the can upside down, so air cannot enter
around the edges of the lid. Any deteriorating reaction is limited to
the top layer of coating, which becomes the bottom layer when you
turn the can right side up.


Gold Star


That's what works but it is not air getting in but solvent getting out.

If it were uncured polyurethane, air does not cure it but moisture in
the air does.