The grenade went a tiny bit of course, but enveloped the armor nevertheless with its bright flash and loud bang.
Unfortunately, the armor absorbed the superficial damage without any problems. Flash bangs - it seemed - where not the solution to this problem...
Hitting is not the problem:
to quote core p. 397:
There’s Armor, and then there’s Armor. This is the latter. This power provides its rating in Armor, and functions just like the Armor power. It differs from the Armor power as follows.
If the modified Damage Value of an attack is less than the Hardened Armor rating (modified by AP), the attack does no damage. Don’t make a Damage Resistance test for the critter; it might not even notice the attack was made in the first place.
If the modified Damage Value of an attack is greater than the Hardened Armor rating (modified by AP), then perform a Damage Resistance test for the critter as normal. Additionally, half of the Hardened Armor rating (modified by AP, rounded up) counts as automatic extra hits on this test.