Hello, I stamp a lot of my sterling silver jewellery and I also reticulate a lot of pieces but I've found it really difficult in the past to polish away the white residue left in the grooves from pickling and after a while, the white bits discolour. Can anyone recommend a way to get rid of the white residue in all of the tiniest grooves? I've recently purchased a dremel with a flexshaft and have tried using the mini bristle brush attachments, but have found these haven't helped either. Any advice would really be appreciated - thank you!