Does anybody know what the wear limits should be for the rear disc brake rotors on an '02 EX 4-cyl? The Haynes manual says to check for the cast markings on the rotor, but I can't find them due to corrosion from New England's fantastic salty winters. I took a micrometer to one of them and got thicknesses between .3500 and .3535 in.

My dealer told me I would probably need new brakes at just about this mileage but I don't know if they meant just pads or pads and discs. I've done every search imagineable and came up empty. Thanks!