It reads like this:

Reinforced Armor: The Armor Class bonus you gain from armor or docents is increased by [15/30/50]%.

Now, the armor class bonus affected by enhancement, includes DEX (capped by MDB, but still) or not? For example:

Let´s say I have an armor that grants me 26 AC and has 4 of MDB (and I have 18 DEX). After spending three APs on reinforced armor, do I get AC 43 or AC 45 out of the armor?

Thanks,

- Khorne