How do I color only one of my UV?

[Rippon25034895lks5]

I have this model that I made. I exported it from Maya and when I put it into Substance painter I cant use smart materials and color only one part. Like For example I want to color the Rims but The whole model gets colored. I just want to be able to color one part at a time without affecting the others. Here is my curent layout of my UV down below.

[Josep Maria23187133lrqy]

You can sue mask or ID Maps.

https://youtu.be/_j27AS0VQOw?t=1232