If I were painting the tail center panel regardless if it was Argent or Organosol, I wouldn't go with rattle cans.
Rattle cans don't have durable chemical properties over the long term. Period!
The paint won't last as long using rattle cans. The reason is that these cars with dual exhaust put out alot of corrosive, partially unburned gases. As you drive, exhaust recirculates up onto the tail panel.
You need a real durable paint to withstand it over the long term.
I recall stripping my Gran coupe argent. It was very thick, durable hard paint.
I can't imagine rattle can paint sparkles as well either as doing it right either.