BenStreeper
Just to stop further confusion on the part of readers I wanted to clear up some terminology for you.
What you are building is a called pep model, an original, or a "Master" not a mold.
A mold (or mould) refers to a container used to make the shape of the required parts or products. It works either by pouring or painting a self hardening material (such as plastic, fiberglass and resin, rondo, or plaster of Paris) into the container, or by pressure, or rotation there by producing a casting (also known as a pull, part, or replica) of the originally built pep model, scratch build, part, or "Master". Now that that's said, your armor is looking very good.