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If you have a hair dryer or a heat gun (lowest setting, you don’t want to melt the plastic) and heat up the effected areas. Don’t keep blowing on the same spot, but move in circulair motions.
The problem is, you sprayed during a humid day, all the moisture in the air settles on the model and mixes with the air born paint particles. The hot air will evaporate the moisture in the paint if you are lucky, if not you gonna have to sand the effected pieces…. Use a 800, preferably a 1000 grid sandpaper. You can start with a coarser one, say 600 and the work your way up.
To avoid any inconvenience in the future, don’t paint on a humid/rainy day.
Good luck and happy building!