Tyre preservative

[Shordy]

I'm not sure if it's common practice or not, but the guy who fits my tyres is old school, and always gives them a quick scuff with sandpaper to take the shine off them before letting you ride off.
That being said, my last tyres I had fitted were Conti's, they apparently have:
TractionSkin makes for an extremely safe and short breaking-in period. Making this possible are a revolutionary buffed tire surface and a specially coated tire mold that gets by without separating agents.