FMP: Lady of the sword - Baking and Texturing

The first baking test came out quite messy and I had to spend some time to solve all the baking errors I had (most of them on the gloves and fingers, some on the armour). The end result was the following:

I started texturing the caracter using the Metallic Roughness workflow, but when I got to painting the armour I found myself a little lost. In the concept, the metal looks very colorful, and I wanted to replicate that. For some reasons, whenever I tried to add colours to albedo channel, the transitions looked odd and harsh. I tried lowering the roughness, but still, the issue remaied.
 Then, I did some research on stylized texturing workflows and decided to switch to Specular Glossiness. My goal was to have the armour pop out with vivid colour variations, as in this image from Darksiders 2.Drawing the reflected colour made more sense to me than drawing the actual diffuse and the look of the metal soon started to resemble what I had been trying to achieve from the beginning.

After the presentation, my tutors told me there was no way to use the Specular Glossiness workflow inside Unreal Engine. Soon, I also found out there was no way for me to convert my texture sheets from Spec Gloss to Metal Rough directly in Substance Painter. However, that was not much of an issue, since I found a tutorial on how to convert those maps manually in Photoshop.
Progress of texturing: