I have made several blades with stainless cladding over carbon steel. The different stainless steel types give different results. I have used 316L, 304, A-ebl, 12c27, 416 and 1.4034 ( a 420 series steel ) The 420, and all the other knifesteel types all show carbon migration while almost none is found when using 316 stainless. A few examples shown - only one with 316 stainless ....2 pictures of the knife. I do not polish my knifeblades to a mirror polish ....theese blades were all hand finished to 800 grit except the 316 which was finished with a 400 belt finish.