Kissimmeeguy

This is my very first post ever on this forum so please forgive my lack of education. I want to learn! What is recast armor and why is it not favorable? Before joining this forum I did a lot of research on TK armor and it would seem that anything recast is talked about in a negative manor but as a newbie I have no idea what recasting means. Can someone explain to me what it is and what the alternative is?