It's a classic paint reaction and it's caused by applying the white paint outside of the time window for a recoat on the red paint. The recoat time is within 1 hour. After one hour has elapsed, you then have to wait 48 hours before you can apply another coat. I waited 24 hours so that I could safely mask the red paint ... big mistake!.
I included a paragraph about paint reactions in my tips about painting in the restoration hand book article. I mentioned this very important time window about recoating paint. Here's how I screwed up: I had recently switched brands of paint just to get this color of red. My old brand had really good paint but when the paint was tinted to this nice color of red, it had problems with blushing. When I switched brands, the new brand didn't suffer the blushing problems and I was pretty happy.
However, I was only using the new brand of paint for this one color of red. For nearly everything else I'm using my old brand of paint. I was in autopilot mode and recoated the model without thinking about the red paint being a different brand. My old paint could be recoated at the 24 hour mark, the new paint requires 48 hours and the failure was a classic rookie mistake: I failed to read the product instructions on the new brand of paint.
I must add , lately I don't read the can because I can hardly see the writing . I swear the writing is getting smaller . Along with the fact my eyes are on the way out .