the only reason they could say absolutely no on that would be if the raptor shell doesn't fit in the green gem paint bath pit, but it would be a very large sum of money you would be paying, they might have that paint bath at the other F-150 plant, so you would be paying for shipping of the shell to the other plant, then back to the dearborn plant for final assembly, plus the cost of having it taken off the line mid production and then space being made when it gets back, I would recommend talking to a dealership that's willing to work with you on it or go straight to ford and try to find someone there you can talk to about it, all I can guarantee is that it would be very expensive if they were willing to do it
remember, money talks, if you got enough of it, it will convince anyone to do anything
but it would be cheaper to have a paint shop do it properly
That's assuming it's a bath pit. A lot of plants now are moving to a 2 stage paint system from a 3 stage. BMW has already done it for their X Series vehicles. Basically they have gotten rid of the primer step and just have a paint and clear stage now. It's also a dry set up and are not using the downdraft/waterpits. Kinda weird, but when I was in the plant back in September they had just started using the new booths and said they are working out great...only time will tell how well it will work without a Primer stage (I'm not convinced).