There is no need to "scuff in" new tires! The only thing that makes new tires slick is the "wax stuff", called cosmolene, that is put on them at the factory to protect them durring shipping/storage. The way to remove the cosmolene is to put the tire thru a couple of good heat cycles. When the tires reach operating temp, the cosmolene becomes soft and eventually "falls" off of the tire. Dealers will recommend puting 100 miles on new tires before you start getting aggresive in turns. However, at the track, a good hot lap or two, ie fast in the straights and carfull in the corners, is enough to remove all the cosmolene, then you are good to go.
"Scuffing tires in" also removes the cosmolene, but ultimately heat is what gets all of it off, hence people using a torch!