I've been interested in cork paint for some time. These bare metal walls need at least a thermal break.
But the research I've done shows the established brands only sell to professional installers. It also shows the step by step instructions that the installers adhere to.
So what I'm wondering about is whether anyone has experience shredding cork for insulation. I know a source for wine bottle corks in bulk. It seems like the progression would be chopper > blender > flour sifter with the residue from the sifter going back to the blender.
That should produce cork dust I can add to a water-based interior enamel. I'd need the three implements, and then I could do some test mixtures.