Leaky type armor originally appeared in P&N mod 2-3 years ago.
No component with the Armor ability will protect you from weapons with the armor-skipping ability. Leaky armors treat armor-skipping weapons as normal weapons. Components with the Armor ability are only damaged by armor skipping weapons once there are no other components left intact on the ship that do not have the armor ability.
However, the abilities "shields from damage" and "emissive armor" are not triggered from shots by weapons with armor-skipping damage, even if they are on components that do not have the Armor ability.
If this does not answer the question, please restate it. Multiple people making multiple Posts in a row is difficult to wade through. :-\