Sweating even in mild temperatures. Wearer gets tired sooner. This is serious armor. It is unpleasant enough that most folks will not wear it unless necessary. Movement is a test of the wearer's endurance.
Objective damage gets a little more complicated when alot of armor is involved.
I deal with it by looking at how many points of damage were done versus the armor value of the victim and the scale value of the victim separately. This is a really piddly amount of damage. No harm done. The attack broke through the armor. Armor is penetrated or broken.