yuppers
I did that as well ... made it so they could be non-magically enhanced. Basically due to some material (armorer and alchemical) hows-it-dones you can give the armor some equipment bonuses.
such as:
a +1 to AC (can use this one multiple times)
DR1
Resist 2 of whatever resistance/immunity the dragon had (some have 2 resistances, you can use both ... I used to have this at resist 5)
1/2 weight like mithral
-2 Armor check (stacks with MW)
+1 Max Dex
-15% Arcane Spell Failure (most difficult & expensive)
also added in option of making padded armor from the dragon (at the size of the dragon, a medium dragon could produce a medium suit of padded).
added in the option to make a buckler (no ACP, no ASF, 1/2 weight ... basically a mithral one, just not metallic)
the amount of equip extras was based on armor size or dragon size (DM's option)
if you would like to see it I'll send it to you (email me
signal72@hotmail.com)