Again, unless these rotors are warped, or too thin, do not turn them. You will be throwing your money away and you will decrease the braking effectiveness.
The rotor is like a bucket for heat. The mass of the rotor determines the size of the bucket. A bigger bucket holds more heat. Stepping on the brake is converting the energy of motion to heat, you need the biggest bucket you can have to hold the heat.
The squealing is probably the pads themselves, turning away the mass of the rotors may only be a temporary fix.
I suggest that you live with the squealing, one suggestion to help with that, is to turn up the radio volume.