Doesn't his armor get rusty?

Arcane: Shield
Base Rarity: Ultra-Rare
Troop Type: Merfolk, Knight
Troop Role: Defender
Troop Id: K29_13 / 6822
Max skills: 18    22    18    11
Kingdom: Merlantis
Kingdom Id: 3036
Trait #1: Water Heart
Gain 1 Life for each Blue ally.
Trait #2: Armored
Reduce damage from Skulls by 25%.
Trait #3: Water Link
Gain bonus Blue Mana from Blue Gem matches.
Spell: Guard the Reef
Description: Explode a Gem. Gain [Magic + 1] Life, boosted by Blue Gems destroyed. Submerge and Barrier myself. [2x]
Mana Color: Blue, Brown
Mana Cost: 12
Spell Id: 8226
Switch Release: Tuesday, Jan 1, 2030