I bought an used stainless steel really large pot (>90 liters) that was used for cooking, but had some kind of water stains inside.
On a (stupid) attempt to clean it, I had it sand blasted, which completely removed that nice, reflective surface that the stainless steel have, leaving an opaque darkish gray surface.
Is this fixable somehow, maybe by polishing or chemical treatment? If its not, is it still safe to use it?
Update. This is what it looks like now: