https://www.msn.com/en-gb/foodanddrink/ ... fef9&ei=39
A bit light on details but the thermal insulation paint aspect seems reasonable based on historical use, I did wonder how 100 tonnes of oyster shells became 900 tones of fabric but I have to assume the oyster ingredient is an addition to normal fabric processing.
On the basis of a first view of the application it appears to be a potentially useful alternative to dumping the empty shells.
Moxi