Plenty of other elderly aeroplanes undertake lengthy adventures, probably with nothing like the support. A New Zealand registered Comanche 250 landed at Wick yesterday from Reykjavik, the couple flying it are undertaking a leisurely round the world tour... the aircraft is perhaps twenty years younger than the Spitfire, probably done at lot more flying and perhaps without the benefit of a major rebuild.
I think It's a great endeavour and wish them very well.