I'm sorry, but this is completely inaccurate. I've been a Delorean owner since 2000, and know hundreds of other owners and participate in frequent club events and national meets (every other year). Very, VERY few Delorean owners have painted their cars, and it wasn't easy for the ones who have (paint does not naturally adhere to stainless steel, so it requires significant prep). The primary reason for painting a Delorean is not for making it easier to care for the car or stainless steel finish, but rather, to hide body damage repaired with Bondo that would have been too expensive, difficult, or impossible to repair or replace (for instance, there are no more stock left front fenders available, and the ones that go up for sale are usually more than $1000).
Also, a Delorean stainless steel body actually requires almost no maintenance over many many years. Since the Delorean stainless steel body has a brushed, grained, finish, nobody is "buffing" their Delorean. Over time (years) if a car gets a few scratches or nicks, it's very simple to regrain the stainless with a $6 blending pad. I've done this exactly once in my time of ownership. If the scratches are deeper, one can use a powered Vonnegut Wheel or Wolf Head Wheel and then a blending pad. This is something someone might do once every two or three years if they're anal about keeping their brushed stainless finish up to "concourse" standards. I've spent hundreds of hours maintaining painted cars, and probably a total of 5 hours maintaining the Delorean finish over the years. It's almost maintenance free. The same would be true for the Cybertruck.
I know of only one owner that buffed their Delorean to a mirror like finish which would require the kind of "buffing" maintenance you are suggesting for stainless steel. As you can see, this is neither a great look for the Delorean nor would be for the Cybertruck: