Background

So, I'm currently writing the biography of my father who was born in March 1948 but before, and after, this my grandfather, George Wells, spent long stints away from the home, travelling the world, apparently repairing and/or dismantling planes that it seems were left over from the WWII.

My father obviously only remembers so much about this but grandad was, for most of his life, a fitter and turner for Rolls-Royce in Glasgow, Scotland. Dad thinks he was in the airforce and I don't know if he saw active service but certainly that, after the war, he was apparently seconded multiple times - with this job at Rolls-Royce secure and waiting for him each time - to the British Air Force as part of this apparent cleanup. According to my dad, "he was part of the force that was going around the world, mainly Asia, and repairing warplanes to come back."

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The Question

So my questions are:

• Does anyone know anything about this sort of thing, where I could find more information about it as part of background
• Does this sound like a normal sort of thing to happen, or was this a fairly unique job?
• What it was likely my grandfather was actually doing and where as part of this work?
• Any details on what kinds of planes or technical stuff would also be great.
• Is there any way to find this info out from official military channels or historical records? While the family is Scottish I'm born and raised in Sydney, Australia, but do plan on heading back to the UK at some point as part of this project, if it's easier to access the info in person rather than online.

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Bonus Info

The multiple times away are rather crucial to the story as during one, before my Dad was born, my grandmother had another kid with a different man - who my grandfather chased off upon his return - and during a later tour she ran away with this man, his kid and her then four children with my grandfather, travelling the UK in a horse drawn caravan as essentially tinkers (think gypsy stereotypes) stealing from one town and selling to the next until... well, you'll have to read the book when I finish ;)

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Any help any of you would be able to give would be amazing! I searched through past answers but couldn't fidn anything that lined up. Oh, and thank you in advance!