IMO a decent rotor shouldn't fold in half the moment it comes in contact with cold water.. but anyway they were warped when I bought the car so who knows how or why, I just thought why not get better rotors instead of machining the warped oems.

Thanks for the responses.. ill make some enquiries.

Aaronng: Honda told me the rotors were warped at my last service and sighted that non genuine pads had been used but didn't say if that was the direct cause.