I feel the delima. Humidity and dampness is no good for outside painting. Can you take it to work,in a controled enviormnent, and paint it there. Maybe dryer and will have better results. Before sanding your supposingly orange peel, be sure the paint is dry dry dry. Just wait for a dryer day. You have waited this long....Or build a paint box and vent the paint out of a window.Simple and crude but works..... Large cardboard box with back cut out approx. size of small fan, with fan blowing away from you, to open window. I am sure these guys might have better options. Move to Arizona. ararararar Good Luck.