Pat I’d say Harry is thinking of something similar to baize-think snooker table felt. You can buy it online in a range of lovely colours for box making and it’s very luxurious not hugely expensive either. It will make a lovely job of the inside and is what I’d do…mitres won’t matter then!Thanks all for the kind words. I don't know what a surge lining is and Google seems unable to educate me, always happy to hear ideas.
I was planning in flocking the tray the knife will sit in and leaving the hidden lower compartment wood (with the brass inlaid so you see it when you lift out the tray). I was thinking of trying to find some local wood shop that has a CNC machine so I could get an piece of wood for the inside of the tray CNC'd with a perfect cut out of the knife - plus a few mm, for it to sit in, may still explore that idea.
Baize: The Ideal Material for Lining Boxes and Furniture
Baize is an incredibly versatile fabric, it is ideal for lining boxes and furniture, due to its flexibility and durability.
www.baizewoolfabrics.co.uk










