I'll probably use this method when I get that far on my own set up, and it occurs to me that to mend a split piece I'd use a strong self adhesive tape.
In which case it would seem sensible to try that right from the start !
I'd just have to identify the strongest adhesive for the duct that I intend to use. With the 'chain' turning inwards, the tape will not be trying to peel off, so this should make the demands on the adhesive less. Just turn the ends over into the inside of the first and last link should make it pretty secure.
To 'flash it up' - how about "chrome spray" from the nearest auto shop - I found it sits well on most plastics, especially if you give it a coat of spray varnish afterwards.
John