I had a small pinky-finger size exposed spot with surface rust when I bought my car. I decided to sand the spot down today and thankfully, it was the lightest surface rust I've ever seen. Porsche does a really good job with rust protection!!
I'd like to now touch it up, but I don't want to repaint the entire panel as the surface rust was only in that one spot, and even if there is some slight peeling paint(I peeled it back some myself to check if the surface rust had spread under the paint) in that spot. Having a seamless match isn't a concern either because of the location of the spot, but what type of textured coating would I use for that spot?