Hello, JP.
The ARB (page 79 in the PDF version) gives the following guidelines for metal armor and the approximate number of points you will get. Note that final armor values are ALWAYS determined by local marshal inspection and determination
2 points: Light Metallic Armor or Heavy
Non Metallic Armor. This level is awarded for
the following types of armor coverage: leather
10 oz. or heaver, a material with a minimum of
¼" wide metal studs 1" apart or less, a material
with at least 14 gauge metal rings spaced 1"
apart or less, chain mail, non metallic plate mail,
light metal scale mail, and light metal plate mail.
Failure to cover at least half of the Armor
Location in these materials results in only 1
point being awarded. Failure to cover at least
one third of the Armor Location results in no
points being awarded for that area. This level
of armor on the head provides protection from
Waylay 2.
3 points: Heavy Metallic Armor. This level
is awarded for the following types of armor
coverage: heavy metal chain mail 14 gauge
American Wire Gauge (AWG) or thicker with
an inner diameter 5/8" or smaller (can vary depending
on gauge), and heavy metal plate mail
18 gauge or thicker. Failure to cover at least
half of the Armor Location in these materials
results in only 2 points being awarded.
Failure to cover at least one third of the
Armor Location results in no points being rewarded
for that area. This level of armor on the
head provides protection from Waylay 3.
Note that “Light Metal” is defined as aluminum
or any of its alloys and “Heavy Metal”
is defined as steel, copper, or bronze. The
marshal’s decision as to this distinction is final.
Hope this helps!
-Adam
Seattle/Oregon Rules Marshal
Seattle/Oregon Ritual Marshal