Here's the reference image & stockphotos used to create "Mark III Armor". If you notice the the reference image (see left) that I've got is pretty shinny cos it was rendered in 3D. After vectored it (see right), the smoothness won't be there but you can try to achieve it by putting in more effort. I want it too look more crisp, that is why I just leave it the way it is now :)
I wanted to do video about the vectoring process but came across similar steps just like mine (see below). It's the exact same way. Do check it out :).