Sounds like somebody who doesn't know how those finishes were done. This would not get you a proper looking result, as the majority of the cherry color is from the grain filler. Also, you lose so much finish in the spray, that you wouldn't have enough to cover the neck.
I KNOW exactly which Burst you are referring to...and I actually tried to pitch a deal on it...but he wanted cash.
Any Details on the burst you mentioned in Minnesota? Year? repairs etc..
Google search Christopher Cross 1959 Les Paul ...