this post was submitted on 15 Feb 2024
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[–] username_unavailable@lemmy.world 6 points 9 months ago

They probably used equipment on (things that are not stainless steel) and the stainless, contaminating the stainless. ( Any cutting/sanding/buffing equipment you use on stainless steel should either be new or only used for stainless previously, iircc. )