It has now been almost 10 years since I have bought an old Carpenter folding bicycle. Unfortunately I was not able to find anything about it.
I changed pretty much everything on the bike – except the frame itself, but even that was soldered 4x times already. As you might suppose, folding bikes are not the best option for travelling and the frame brakes here and then like it was made out of plastic. I could try would be sanding the frame (lots of layers of paint) and search for something.
Michael Jermář Prague, Czech Republic