Procedural Dust and dirt

[PWM-E]

Hello, Fellow community.

I am trying to understand how to make a dusty/dirt surface with corona physical material.

I tried to make it but it does not look good at all.

Ideally, I want to make something like this

or any other tips to make this.

ideally, I want to control the spread etc.

attached image for rough idea of what i want to do

[romullus]

Create Corona layered material with carpaint material in the base and dirt material in first layer, then add some black and white dirt mask where black colour will reveal your carpaint and white will show the dirt.

[Beanzvision]