keyur vyas

Hi everyone, I want to make red brass bushings and I wanted your advice on either should i melt red brass ingot or should I use copper, lead, sn, zn to make red brass ? Also if I melt red brass which elements will I loose? I melt red brass but when it gets solid again it looks kind of dark colored like black, what am I doing wrong? I am melting it in induction heater.I would really appreciate your advice. Thank you ver much.