All GNs came through with lacquer paint jobs. But it was during that time in 87 when the transition was taking place from lacquer to urethane paints. During the years a common blending technique was to fade the base and clear the panel during repairs. Like `Drop top` says, a good indication to what you have is try a small spot on the car with compound. Black residue indicates single stage,commonly lacquer. No residue indicates clear coat. A good buffer/detailer can bring your paint job back to life regardless of what it is. And some wetsanding also helps. But if you want the best paint you can possibly have, stripe off all that lacquer and start fresh with a new paint job. JMO