Paint raised blister on fibreglass body TVR 1981

[french dave]

Hi,some advice appreciated on freshly bought classic TVR.Paintwork is in good condition apart from noticing a raised blister of paintwork just below fuel filler.When I press on it the paint surface moves.Its not cracked yet.Seems to have come up since I got the car home and it's sat outside for a few weeks in the cold weather.Were moving house - yes I know it's Christmas!!! But should be in garage attached to house this weekend - so out of the weather.Does this require re-spray of the whole offending panel or are there any other solutions.Car resprayed in 1990's.thanks in advance dave

Edited by french dave on Thursday 28th December 20:48