Nice, is that Arctic Silver?
yeah you have to be careful with the microfiber towels on paint surface. Some MF towels really should only be used on interiors.
Microfiber is used to make everything from janitorial suplies to socks. Its no indication of th quality of the thread. Turtle wax or anyone else can slap a "for cars" label on any MF towel.
Here's my prewinter 17 SG layer project with 1 layer of S100 carnauba.
my old car with a bunc of layers of Klasse SG and P21S