Next shape up the armor plate edges with the knife end of your sculpting tool. Done right this will give you a fairly sharp edge.
Smooth out the plate. In this picture you see me using the round cup smoothing out the GS. This is a cool picture, as you can actually see the water between the cup and the GS, as I was lifting the tool to back up and smooth an area out.
Here you see me using the spoon/spatula end of the metal sculpting tool smoothing out the GS on an arm.
At this point I want to make the plate on the leg into several plates, so I’m using the firm flat chisel point to make raised edges for what will be overlapping plates.