Thanks for the replies. I really do not know what the paint is, I've had it for about 20 years and it is so noxious that if I use it I have to use it outdoors and leave the work in the shed for a week or two before bring it in the house. A work mate and former REME armourer says it sounds like the stuff they used to use but is banned now, however I can't understand why the finish ends up so different.

Yes tankhunter, ragtop comes from me owning a Land Rover Wolf soft top.