I have a few projects planned where I will need to weld copper to copper. Some copper pipe, and some copper sheet metal. These projects will need strong welds, I also dont want a brass look where the weld joints are, like sweating in plumbing. I am looking into patina or burnt copper finish when I am done, so it has to look good, I can grind down a weld with no problems if the process doesn't add another metal type that will show through and ruin the look I am going for. I appreciate any and all comments!