"Norminn" wrote in message news:m9uki.5949

Hot sun caused it ... the varnish/paint dries to film before solvents
evaporate, solvents are trapped beneath the film. If you have to recoat
it, try to shade it...just sheets of foil, taped somehow to shade the
door, will keep the heat off until it is completely CURED (longer than
"dry"). Also, a good idea not to close it tightly until it is cured, or
at least a couple, three days. Good vacation project )

I agree with this. If you stained the door a dark color and have a large
glass in the storm door, it is amazing how hot it can get in the sun. Metal
door that are dark colors can give you a nasty burn. Keep the door open for
a time to keep the sun from hitting it directly.

Keep in mind that while the urethane may be "dry" in four hours, it is not
fully cured for about 2 weeks. Keep it cool until then.