Are you talking about the inventory icon? You need to change that manually in the icon selection of the properties.
No, the actual appearance when worn. When you put on any variety of bracer, it looks as though a character is wearing the same pair of leather gloves. I tried adjusting the models in the toolset but they seem to do nothing despite having about 50 to choose from. I then went in with gff editor and tried to manually add a gloves user-defined struct, (along with the color bytes and everything else that regular gloves and armor have), to see if that would work. No luck there either.
Mechanically, bracers are the best AC in the game, since armor is capped below them, but I can't get them to appear when worn as anything except leather gloves. Making them "gloves" - which I can control the appearance of - caused them to behave differently with regards to AC bonuses, acting as a ring of protection instead of "armor."
I do know how to make an NPC appear a certain way, (Never Draw Armor, Never Draw Helm + customizing their base appearance), but this is something I have been putting together for players use. (As the housing zone is intentionally designed to sit "outside the main plot-line" functioning as a home base for characters to import and export other module out of). It's not just an adventure, it's a headquarters for your player(s) before or after completion. I am heavily focusing on a player's ability to craft and cosmetically customize their gear - my intention is to have vendors that will sell one of every pattern of helm, glove, boot, armor, cape, backpack, ect, in a host of colors, which players can then buy and enchant to their liking. (In many respects, I am putting a bit more emphasis on some sandbox features than you'd typically encounter in a WRPG). It's been a lot of work, and I have completed everything except the bracers, but I am at an impasse.
I do have the equipment customizer installed, but it's selection of designs is actually rather limited, and I am not only personally far far below the skill level needed to make modifications to this beast, but in peering at it's guts, it's not someone that I feel is feasible to ask/beg/pay something else to improve on. Not to mention it's rather huge and chokes the tool-set on module load as-is, if I added the 1000 or so item's I've custom made, it would choke further I suspect.
From playing NWN2 for a few years with my pals, one thing I've noticed and heard complaints about is that by the time they reach the end of MotB, everybody looks like a Rainbow-pimp who marinated in a vat of liquid skittles. It bugs me, it bugs my pals, and I have been working very hard to give players a way to exercise more control over their appearance.
There, hopefully I explained the situation a bit better. 