I painted our metal garage door at the weekend using a Crown non-drip gloss. I reckon I prepared the surface well and used a good undercoat. It looks great apart from three rather large round areas towards the bottom of the door that are very dull and look like they have condensation on them. If I wash the door down they disappear and the whole door looks glossy but as soon as that dries the patches re-appear.
Anyone any thoughts on what might be causing this? It was around 14 degrees c when I painted bit it did drop down to close to freezing overnight afterwards.
Will I have to sand back and repaint??
Malcolm