Blender

Introduction

Some introductory material to Blender 3D.

Theory

Animate Paths

The animation of paths is easy with AnimAll plugin. Enable it at Preferences.

Modifiers

Array

Bevel

Curve

Shader Editor

Rusty metal

Add Bump (Strength: 0.5), ColorRamp (to Bump/Height), NoiseTexture (Scale: 1.5, Detail: 16), Mapping and Texture Coordinate.

Also a second Bump (to Bump/Normal), NoiceTexture (Scale: 50, Detail: 16) and NoiceTexture (Scale: 20, Detail: 16).

Wood

ColorRamp (brown, orange--brown), NoiseTexture (Roughness: 0.75, Detail: 4, Distortion: 0.7), Ctrl - T (if Node Wrangler Add On is enabled) pops Mapping (Scale X, Y or Z: 7) and Texture Coordinate (Object -> Vector).

Bump (to Principled BSDF/ Normal). NoiseTexture to Bump/ Height (Strength: 0.01).

References

Blender - Procedural Rust in Blender 2.8 Nodes

Blender Just Made Creating Wood So Easy in Blender 2.9!!