To see a breastplate, when you are dreaming, can be interpreted as protection of heartbreak. In the dream to wear piece of armor covering the chest, means your attempt to protect yourself from love, desire and passion. Perhaps you feel that you have to protect yourself emotionally and spiritually.
Dream dictionary: nail tools on chest dream meanings
…Dreaming that you are brewing tea, foretells that you will be guilty of indiscreet actions, and will feel deeply remorseful. To see your friends drinking tea, and you with them, denotes that social pleasures will pall on you, and you will seek to change your feelings by serving others in their sorrows. To see dregs in your tea, warns you of trouble in love, and affairs of a social nature. To spill tea, is a sign of domestic confusion and grief. To find your tea chest empty, unfolds much disagreeable gossip and news. Dreaming that you are thirsty for tea, denotes that you will be surprised with uninvited guests….
…Lice in a dream mean worldly success and prosperity. If one finds lice in his shirt in a dream, they mean receiving an endowment, or renewal of a leadership position. In a dream, lice in one’s shirt also may represent something one does not care for it to last. If one’s shirt is made of a rag, or if it is tattered in the dream, it means indebtedness. Lice on the floor in a dream represent weak people. If they surround the person in his dream, it mean that he mixes with such people. If he hates them in the dream, then they represent his enemies, though they cannot cause him any harm. If they bite him in the dream, then they represent people who slander him. If a louse flies away from one’s chest in a dream, it means that one’s son or an employee has run away…