after you have reachd level 99 in two skills ever cape after that becomes trim'd.it still cost the same as regular capes BUT it gives and extra 4 prayer points :note the hood dosen become trimd.
Players can't trim armour in runescape, it is a common petty scam used by players to get other players armour. It's an old scam, and only mentally ill players would still use it.
Trimmed amulets can not be created by players. They are from Treasure Trails in the members part of Runescape. To start a treasure trail you need to get a clue scroll. These are dropped by almost...
You can not trim armor, you can only find it in Treasure trails ,buy it in the GE or if your lucky, buy it on the street.
I always wondered how someone would get that.