No u can not have multiple enchantings on a single piece of armor, if u enchant say your gloves for +5 Strength, and u want to turn around and enchant +5 Stamina on them, then it'll ask u " Do u want to replace +5 Strenght with +5 Stamina" so theres question 1. Now #2 yes u can enchant any piece of armor, your friends to your brand new spankin epic chest piece. Hope that helps.