Hi
This is an arm I did during my free time, it is a part of a character I am currently working on.
I learned and use substance painter for the first time for this project, and tbh it works great! I will introduce it to my workflow for sure 
I modeled the arm in Maya, sculpted it in Zbrush and did all the dirt/breakup maps in substance painter, rendered in Redshift and Maya.
The next step will be the clothes of the character.
Cheers!