I'm looking for a bit of advice please. Just over four years ago my MY2000 MPI had a new front end (but we kept the original bonnet) and sills fitted and was resprayed except for roof and rear between the seams. All seemed well until last summer (3.5 years after the work was done) when I noticed small bubbles appearing down either side of the bonnet. I thought it was rust but the bubbles we not "rust" shaped, rather more regular, looking like drops of water. Over the last 6-9 months things have got worse and all the other panels that were resprayed have much smaller bubbles appearing - it looks like the car has got goosebumps!! I'm hoping to upload some pictures in a minute. They're taken of the rear corner of the bonnet on the offside.
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I took the car back to the bodyshop that did the work and he said he had never seen it before and said the work was done 4 years ago and there is nothing he can do!! He asked if someone had been grinding near it - no and it isn't that sort of rust spot induced by a steel filings anyway. It seems to be coming from inside.
Only the panels resprayed are effected but not all over. Some panels have a patch but another part of the panel is clear..... still to breakout I suppose!!
The car lives outside and occasionally has a cover over it - one of those Stormforce breathable jobbies from minispares.
Any help, advice, experiences would be great, thank you.