^ This.
I've slicked a few tyres, Blakes ones included. It's very easy to go straight through to tube and pop it. After a few mins you'll find a pattern you like, I tend to go from middle of tyre to the side on one whole side of the tyre then flip it round and do the other side.
Breadknife first for sure to get rid of any bigger nobbles. I metal cutting disc for final part, I've tried flappy sanding paper discs but they're shit and take forever.