Candy nuts are easy, combine sugar+water+nuts in a pan on med high heat. Stir it up. When the the sugar crystallizes, turn the heat off but keep stirring until you get caramelization. You can add some lemon salt in the final step to make these sweet and sour or other extracts you want to experiment with like vanilla or peppermint.
Savory is different technique and some people recommend using eggwhites to bind their seasonings. I like to dip my nuts in broth
Anyway, just dunk 'em in hot liquid water/broth, then to a baking tray, season with whatev
, bake for about 10 mins 350f. Try popcorn seasoning powders and dusts like Doritos, Ketchup, and Texas Pete's.