what are the symtoms thats your rotors are worn/warped?

Have to agree with everyone above. You have classic symptoms of pad deposits from overdriving the thermal range of whatever pads you have on there now. Not surprising if you are doing 120 - 60mph braking events. Brake rotors rarely if ever warp despite what many people including mechanics and service managers think. They may honestly believe they are telling you the truth, or they may just want to sell product and service. Most have a limited knowledge of physics and materials engineering. And their solution will always work temporarily but you will be a repeat customer unless you change your pad selection or your driving style or both.

To the guy with the GSR who disagreed because his service manager said they were warped. He is just wrong which wouldn't be the first time that happened. Before I learned a bit about brakes at the track from knowledgeable people who had actual track knowledge and not a vested interest in selling you new rotors I had a GSR that I thought had warped rotors about every 6mos. I was constantly having them machined which always fixed the problem for a month or so. Problem is that the GSR has a nice motor and completly inadequate brakes for the cars speed and handling. This results in everybody who is the least bit agressive with the car getting pad deposits on the rotors which are permanently cured by upgrading the pads to a higher thermal range which is what you should do. The Type S brakes are better than the GSRs but they can be overdriven on the street particularly if you are prone to reckless behavior.

Any brake pad, ceramic or other, can cause pad deposits if you get them hot enough.

Get some Axxis Ultimate pads or similar and slow down and confine your high speeds to the track.