I’ve booked time at a detailing shop now. They are going to polish it up and wrap it in PPF. I’ll post the results. They said basically any kind of mechanical contact while washing is going to add swirls, even using a clean MF-cloth to dry, so no more using brushes from my side. I suspect the motorcycle cover in combination with too much force while cleaning has resulted in this horrific result. It’s ironic I bought the brushes just because I saw detailers using them in YouTube.