I've just been talking to DBA, and have just received my set of Clubsport T3 rotors, which is their new design for the 4000 series.
Their recommendations for track days are:
The rotors must be at least 400km old (The first 400km of a rotors life needs to be normal driving)
At the beginning of each session you should always do one warm up lap using moderate braking to bring the rotors up to temperature.
At the end of each session you should do a warm down lap using moderate to light braking to bring the temperatures back down.
When you park the car don't apply the hand brake, you also should push the car forward every few minutes to prevent heat soak into the rotors.
You will notice light crazing on the surface of the rotor after a session, this is nothing to be alarmed about this is all normal.
I'm tracking my in November at the SAUSA track day, so trying to get prepared.