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Local powder coater says a chap brought in a raw steel motorbike frame and had blow torched the welds/tube ends to get the purple colouration back. Any one heard of this or done it?
Like this:
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Thanks
^i first thought they were genuine weld heat marks but on a second look - there isn’t one for the tank mount stud so maybe someone did trace the welds with a torch? It would need to be something warm and focused to get the heat in quickly - and remember heat isn't your friend when talking of the general metallurgy of bicycle tubes.
I’d just give it a polish with a proper 3m scotchbrite cloth and then clearcoat, you’ll be happy with it.
Thanks Rusty. Think I’ll go with the safer option here! Out of interest it’s Reynolds 853 if that makes any difference regards heat
It'll only be braised rather than welded if its 531? Getting enough heat into it to get colouring like that would melt the braise I would have thought.
Thanks rockhopper. It’s 853 if that makes any difference
I've been down the clearcoated steel route, and it was repainted black not long after, as it was rusting like mad.
Clearcoat might work better on 853 though, it’s stainless, so is unlikely to rust badly.
Id be wary of using heat for discolouration purposes though.
I’m not a metallurgist though, so could be talking complete shite. 😂😂
Is 853 stainless? Thought 953 was the super flash stainless steel?
853 is not stainless.
nope definlty not, 853 Seamless Air-Hardening Heat-Treated Steel and 953 stainless.
My mistake 😂😂
Right then...scotchbrite it is then!