Slickness is not a hallmark of silicon coatings, either silicium, like Permanon or C2, or covalent silane coatings like C1 or Aquartz, etc. These are a different animal from what we're used to. Indeed, they become "grippy" rather quickly. But I have never noticed that they did not shed contaminants. IMO, they shed quite well. Beading has always been strong for me. IMO, shine is where they excel. Shine is as good on day 60 as it was on day 1. Two months is about as long as I can hold out without doing something to the finish. But, that shine is undiminished by my weekly ONR wash, and I can say unequivocally that my previous favorites, UPGP and JW AJ, didn't retain that shine anywhere near as long as the silicium coating.