Cool stuff ColdWave.

I don't think you have to model the wear of time either. You can get a lot of milage out of plugging noise into displacement maps, or paint dirt (in grayscale black to white) in stripes running downwards and plug that into diffuse.
The dirtier something looks the more real it gets and is extra important to show age and wear of time. Apply this to textures as well.

Here's a couple of more tricks that might aid you. Toni Bratincevic made a tutorial.
https://www.interstation3d.com/maya/t...of_glimpse.htm

Have fun now.