Caravan Paint
Does anyone have any suggestions about what might be happening to the paint on my 3 year old Lunar? Whilst giving it a clean and coat of polish today (it gets two polishes per year), I've noticed a patch of the paint very roughly 8", 200mm in diameter just to the side of the door which appears to be going very slightly yellow and is developing slight blebs of between one and two millimetres in diameter. They don't appear to be hollow blisters and there are about six of them. I'm pretty meticulous about paintwork on both car and caravan so I'm sure that I would have seen the patch and blebs previously although obviously I can't be certain.
The puzzle is what can be causing it. First thought is that the area had to be 'touched up' when the panel or caravan was being made and it is the paint used that is possibly ageing differently to the original coating but why the apparently solid blebs? The caravan is stored at home so there is nothing which could have been accidentally sprayed onto the area that I wouldn't have known about.
I don't want to T-Cut it as that may cause more of a problem.