Idea for painting my 75... would it be too crazy???

I had an idea last night on how to paint my 75 /6. I was thinking a black metallic underlay... then placing the original decals on the car and having Plum Crazy shot over it (to give it a deeper purple color and some metallic)... then removing the decals so the black metallic shows as the decals. Would this be extremely difficult to accomplish and be extremely high priced? Or is it something that is possible? How do you think it would look?

Can't wait to hear responses!!! (oh and the colors are not set... of course)