I have some old smoked nuts- can I make anything with them

I have had some luck with other oily nuts by grinding them down into semi-large pieces, and then letting them dry out on a flat cookie sheet. Then, step-wise, grind iteratively, with dry steps in between. If you can do this one time with a lot of product, you can save some in an air tight container for next time.

For raw, harder, and bulkier nuts like Almonds try a slightly lower temperature, say 180°C (350°F), and for a longer time

For re-roasting previously roasted nuts use a microwave oven (I know...). Same recipe, but just a few minutes on high. Watch them the first few times until you find the magic time limit before they start to burn

Commercially more and more people are using continuous microwave roasting machines, so using the microwave at home is so bad...

Personally, I like nuts aged in their shells before roasting