If you hand wash your Taycan what products/techniques do you use?
For me it's the same wash technique for a decade, and I highly recommend it to anyone who hates swirl marks:
1) Pressure washer with a wide tip to reduce the pressure to a few hundred PSI
2) Foam cannon to apply wash soap
3) CR-Spotless high capacity deionizer cart (there are other brands as well) for the rinse
4) 36V Makita brushless leaf blower to dry
5) Microfiber cloths - sorted by age/use to reduce the odds of dragging something gritty across the paint
Process for a well waxed car:
1) Wet the car with the pressure washer and let stand for a few minutes - really helps to soften up the dirt/bugs
2) Spray off any loose dirt with the pressure washer - removes 95% of all dirt
3) Spray on some car soap with the foam cannon, and let stand for a few minutes
4) Mist on a bit more soap to re-wet the car
a) If the car is very dirty, spray with the pressure washer, soap again, and wash with a microfiber cloth, changing cloths when you see any
dirt. If not very dirty, proceed.
5) Rinse off with the pressure washer hooked up to the de-ionizer spot free rinse
6) Blow mostly dry with the Makita blower
7) Open the doors, etc. and dry with the microfiber cloths
Unless the car is quite dirty, a wash is almost completely touchless, requiring a cloth only to dry the nooks and crannies. I do a "paint perfection" level polish on a car and it stays swirl-free for about five years - though this is in California so YMMV.