Baby oil will work fine it is almost pure mineral oil (and since it is safe enough for a baby it certainly is safe enough for an adult who can grow a beard) A small amount on micro-fiber and coat the WHOLE blade, clse it open it again and coat by wiping it again. As for removing rust try some 600 grit wet dry sand paper GENTLY with honing oil . then move up to 1000 then if you want mirror up to 25000 grit then mothers. and finish with soft tissue paper.