More information;
I was trying for an abrasion/scratch resistant polycarbonate, however I am now convinced this is not a suitable product for cold bending.
All that Sonex will divulge is “Lexan + .118” thick Bronze.” which can also be got from the plans. No information on the actual Lexan product (number) of which there are many. So not much help from that quarter.
Interestingly if you Google “Lexan + .118” thick Bronze" you will get Lexan 9034.
Lexan 9034 turns out to be a general purposes Polycarbonate principally aimed at indoor applications, so no UV resistant treatment.
Without conducting more research, it would seem this product has been selected by Sonex, because it is available in various coloured tinted sheet ( Bronze ). I am a little disturbed by what would seem to be Sonex's focus on aesthetics over function.
In Australia polycarbonate, matching or close to Lexan 9034, is widely available in clear (some tints are available), 3mm thick sheet, of varying dimensions - other brands include Makrolon, Zenolex, Exolon
So far, the Lexan alternatives all offer UV resistance - don't know if this is an important factor or not - your comments?
Some Australian suppliers:
Mulford Platics
KF Plastics
Plastral
EPlas