Sim (exceto melhorias de preço fixo)
De acordo com o Core Rulebook, página 505, e Ultimate Equipment, página 272 (citado abaixo):
Alternatively, bracers of armor can be enchanted with armor special abilities. ... Special abilities usually count as additional bonuses for determining the market value of an item, but do not improve AC. Bracers of armor cannot have a modified bonus (armor bonus plus armor special ability bonus equivalents) higher than +8. Bracers of armor must have at least a +1 armor bonus to grant an armor special ability. Bracers of armor cannot have any armor special abilities that add a flat gp amount to their cost.