I have owned my Kitchenaid Proline KSM5 for several years. I love it and own several of the other attachments. The original flat beater was a white coated version and it eventually started peeling/chipping which deemed it unusable and not food safe.  I went to a local cooking store & purchased the Burnished Flat Beater as a replacement about 1 1/2 year ago and keep it hidden from the rest of my family in fear it will end up in dishwasher and ruined.  I would REALLY, REALLY like a stainless/dishwasher safe option.