This might be a fun solution to two problems, 1: Wearproofing hatches and doors. 2: Improving aerodynamics by preventing gaps, creating a flush surface. Can inflating seals be developed and installed around the doors and hatches? These exist, i'm not sure what industries currently use them though. When specifying colour for the vehicle, they can have colour matched seals or a different colour. Some people might really like white seals around the doors on a baby blue Aptera. I can see the seal existing just under the doors lip, its profile will be such that once inflated it will not only meet the doors frame but protrude slightly outward to make the gap as flush as possible. The added complexity will be the compressor, and the seal itself. https://www.easternseals.co.uk/inflatable-seals/ https://jehbco.com.au/products/silicone-gaskets-o-rings/inflatable-gaskets/ Ect.