For the wood material I followed the excellent and in-depth tutorial made by Derk Elshof.
https://www.artstation.com/artwork/nQgRPe
For the metals I used a new approach for me, based on Quixel Megascans maps. The goal was to use them as reference and try to reproduce some of their characteristics procedurally, in Substance Designer.
Special thanks to my teammates on this project:
https://www.artstation.com/albertocordero
https://www.artstation.com/laetitiabertrand
https://www.artstation.com/albertognolo