Been trying to figure out why you need to train armour?
If no training at all, 1 hit from a rogue will kill you, yet if you have say 10, at best it will scratch you. Now do not know how you think about this, but armour is same, for both yet does not protect same, now why is this?
We have repair armour, so I think this should determine how well you are defended.
Now lets think about repair weapons. Do not know about you but in real life I would use a wet stone to sharpen my kitchen knifes or garden tools. I have had one for years, it still will out live me, so why do we have to by over and over repair kits?