Join Date: Nov 2011
Location: Toronto, Canada
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As someone who has worked with iron and metal my entire life, including welding and inspecting welds. I can tell you that the answer is yes and no.
Yes the braze looks fine. But,... no it wasn't cleaned up before the finish was applied. The slag should have been chipped off, and wire brushed, then the area would next be buffed of burn marks, scratches and weld splatter.
Someone cleaned up all the welds on the frame but missed that one, maybe he was distracted by someone or something, or it was Monday morning and he wasn't paying attention. Somehow it also got past inspection (or nobody noticed) before it went to the paint booth. Then on top of that it got all the way down the assembly line without anyone noticing or caring. Then it got past the final inspection and boxed. This doesn't look good for Brompton's quality control, makes it looks like quality is going downhill.
It's purely cosmetic.