On a more serious note, today I was washing the car with a power washer. I noticed a spot of what appeared to be dirt on the inside front wheel well, right at the bottom where the undercoating is. I pointed the power washer at it for a couple seconds but it did not remove the mark. So I adjusted the power washer to put a more powerful thin stream of water. To my shock

it removed a small piece of the paint and undercoating which now looks like a gaping scratch or a permanent piece of dirt on the car.
I am thinking I can go buy a little bottle of touch up paint and fix it. It is not a smooth surface to begin with so I think the little bottle with the tiny brush should do the trick. Of course finding one where I live will be almost impossible....
Two questions: First, would this be the correct course of action to correct this type of mark. And second, if I cannot find Porsche touch-up paint, would another generic red do the job?