This is the original B/W photo, a self-portrait of Athanasios Porporis provided by him.
He is the founder and an active member of Melbourne Hoplitikon Re-Enactors.
To achieve greater historical accuracy, I had to "remove" the mustache...
The miracle of Photoshop!
Switch to color (CMYK model) mode, plus the "Shield Border" over the cuirass (multiply layer mode),
The final image with the 3D model shield (3D Studio Max by Vipe Productions), emblem and rim rendered after my vector design (Adobe Illustrator) and the back ground.
I apologize for the watermark, but as it turns out, is necessary.