The FAA has a book called Aircraft Inspection and Repair which covers quite a lot and is helpful if nothing else as an overview.
Thank you, will get hold of that!
I believe the correct FAA publication that was mentioned is "AC 43.13-1B – Acceptable Methods, Techniques, and Practices – Aircraft Inspection and Repair "
This is The BIBLE when it come to GA maintenance.
A downloadable copy is free on the FAA website, careful, it’s some 500 pages complete.