I have a 98 GTS in Silver.
I have the bubbles around the gas filler, on the bonnet near one headlight and on the rear fender near the spoiler.
The bubble have flared up recently, they have alwys been there but just very very small.
I polished the car recently for a car show and had it in the sun so i believe the gases from the resin body are now trapped under the paint. The bubbles on the fron came up and went down over a few weeks but the ones at the rear just keep getting bigger, i guess well wait and see....