I've been doing some copper art stuff for a while now and I'm constantly learning. I'd like to learn how to join copper tube/pipe and keep the copper still shiny. When I braze my joints the resulting joint is dark from the heat and excess brazing material very often goes where you don't want it. I have to either use a scotch brite pad in a die grinder or sandblast the joints to clean them up. Either way, the copper doesn't stay nice and shiny. If you look at some items from this company in Denver, you'll notice their tube joints are all very nice looking. I'm sure that they don't spend the time to repolish. How do they do that?especially the 5th through 9th pictures on the page.
Any and all help would be very greatly appreciated. Lane