question about Impervious armor

[Baumfluch]

Hi, a short one hier.

got this armor ability:

Quote:

A shield or suit of armor with this special ability is especially hardy. It gains double its enhancement bonus to hardness and hit points (instead of just the enhancement bonus), its break DC increases by double its enhancement bonus, and it gains a bonus on saving throws against direct attacks (such as a rust monster's rust ability) equal to its enhancement bonus.

lets say i have an adamantine armor +3 and impervious(+1).

a normal adamantine armor has a hardness of 20.
an adamantine armor +3 has a hardness of 26 (20 by the material and +2 for each +1 enhancementbonus, so +2+2+2 = +6)

if i make it impervious now, does it have 32 hardness (doubling the +6) or does it have 29 hardness (since doubling 2 times in pathfinder means actually multiplying with 3)?

i think 32 would be correct, since imo its not really doubling the enhancement Bonus. i think the enhancement, Bonus to hardness is +6 (+2 for each +1) and you double that once. so 6*2 not 3*2*2.

thx already

[My Self]

You double the 6 and get 32, not 29. I suppose it's an artifact of older writing that has Impervious worded that way.

[Majuba]

Necro'd...

I was inspecting this armor quality - the text regarding hardness and hit points is actually a throwback to 3.0 rules (not even 3.5). Reading it as double the actual benefits (instead of providing less than usual) is a pretty solid benefit for a +1. +3 Impervious steel armor would have 22 Hardness (so ignores adamantine's bypass quality) and a whopping 60 bonus hit-points.

Definitely needs an errata.