I had a stainless frameset built by Dave Anderson (what is it about amazing bike craft and the name Dave? Add Wages to the group). I live on Martha's Vineyard and found that tiny rust spots appeared on the ends of the main tubes near the lugs. I wondered if the added heat of brazing somehow slightly lowered corrosion resistance. There were no spots on the stays. FWIW, the main tubes are KVA stainless.
I learned that minimal maintenance would keep the spots at bay, but eventually opted to have Dave (who did his own painting) re-finish the frame so that only the stays and lugs are bare stainless. I actually think the frame was even more beautiful with more paint.
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