Its real hard to see from them pictures, but looking at how bad the top of the hoods looks, it sure seems more like contamination to me. How did the bottom of the doors look. If it was dry enuff to tape the two tone off with out the tape eating in to it or peeling it off, its usually good to go. Then again ,metal temp is pretty critical for most clears to kick properly. Im not familiar with nason brands, but most paint lines I have used do have special hardeners( Polar hardeners) for cold weather shops. Hopefully your bed goes better with warmer temps. If all else fails, sacrifice a six-pack to the paint gods and do alittle dance, sometimes that helps.