I have a similar problem with my solar red ZT, quite a few paint defects are now popping up, seems to be getting worst each year.
The bonnet has lots of tiny pimples which actually looks like chickenpox, the spots are raised and can be felt if you rub your hand over the bonnet.
The N/S front and rear doors has several circular areas of crazing, small circular raised crack lines.
Plus the roof and boot has faded, seems to notice in certain sunlight, quite strange really.
The old girl really does need a respray.
