All,'
If you really want better life from both your semi metallic brake pads and rotors you need to have them cryogenically treated.. Nothing else will give you the life span, period. Proven, over and over and over again..
The one company that I found in the UK that does the rotors is: http://www.frozensolid.co.uk/motor-sport/. (no affiliation!) They seems to be OK..
NOT everyone does cryo the same. Ask how long the hold time at -195c they treat at . Should be min 12 hours. Also ask if they temper at 175c after treatment (a must).
3X to 7x the life from the rotors. Pads less BUT the cost to treat both should not be so bad. Our prices stateside are: $50ea for rotors and $20 ea for set of pads.
Whats treated in motorsports:
Complete engines
Suspension components
driveline components and of course brakes.
etc etc..
Lots and lots of research and empirical data out there of this process..its been used in top secret US aerospace labs for many years. F1, Motogp, Drag racing WRC.. amongst many others..
If you have any questions please don't hesitate to ask...