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Hi! My name is Luna, I am a sustainable accessory designer based in Berlin and I am looking for advices. For my MA thesis, I am researching into the automotive industry and I am trying to theoretically develop a highly durable leather, able to last for multiple generations. I am focusing my research on three key parameters: sustainable livestock, which give the best quality of hides, vegetable tanning, the most durable, firm and resistant option, and bio-based PU coating. I know that Polyurethane coating help increasing durability, wear-resistance and UV protection on leather and is quite common in the automotive industry. However, I don't find any research paper debating PU coating applied on vegetable tanned leather. Then, I am wondering if a really, really thin layer, perfectly manufactured and balanced on the veg-tanned leather is possible. Also, do you think that the "patina", that veg-tanned leather naturally develop while aging, will develop also with a really really thin PU coating applied on it? I am looking forward to hearing your opinion and advices and I would love to thank you all in advance! Luna