Subject: Re: Leaf Spring Bodge Buttons
My V12 was rebuilt to "as new" standard in 1945 (the youngest car restoration ever?!), including new springs. When I removed these to have them reset and retempered, I dismantled them, and discovered that the interleaving was (unmistakeably from the smell!) bakelite. Not a material I would have considered suitable...yet it was largely still in excellent condition, so clearly up to the job despite that.
Presumably zinc in short supply at the war's end. The spring rebuilder replaced it with zinc interleaving, however did return the original bakelite strips to me. So...there is a period precedent for plastic interleaving!
Laurence