Ouch, what a nightmare.
I've had it happen a couple of times, and there are few things more frustrating.
If I had to guess, I'd say that it will take a full stripping and repainting. It looks like the silver was softened, and the metallic elements in it have 'lifted'. The same effect could easily have happened with the red body, but even if the solid color was softened you may not see it- you only see it in the metallic because the metallic bits shifted.
What was the body primed with?
I would of course strip in alcohol. It will definately remove the TS, and if there is some issue with the Revell plastic it's less likely to react with alcohol than DOT.