Thanks - I have just sited the tub and was about to give it a decent nuke.
However, I just noticed a number of small blisters on the shell. They are in the footwell, base of seats and are probably about an inch in diameter but none are hugely pronounced. I only noted them because I ran my hands over the whole shell to check for them.
They are all hard and none appear to have cracked. Should I leave them whilst they are no trouble or should I be trying to heat, prick and reseal? I dont want them to fail and all start leaking but then I dont want to puncture holes and then cause just as many problems myself.
It is acrylic with a fibreglass undershell.
Thanks