HELP! How do I add grain / noise to my car paint

[CrimsonsCane (Ares7)]

I’m working on a street racing game that’s focused around realism but I can’t find any free pbr textures online or know how to make actual vehicle paint. I’m looking for something that resembles this, any ideas?

[VertexSelection]

I made a texture for you in Adobe Substance 3D Painter, here’s how they look:

Here’s the zip file containing the textures; ColorMap, Metallic, Normal, and Roughness:
1kCarPaint.zip (6.0 MB)

Oh I forgot to add, do not apply ColorMap if you want to change the color directly in studio (which is what I prefer.)

[lonely1and1afraid (Illusive)]

There are many free metal textures online. I would recommend using ambientCG. Anyways, you can add a MaterialVarient in MaterialService and set your material accordingly and replace any material you want with that material. I would also suggest using Organic tiling. Then just apply that material to your model.