Rotor wear Boxster S brakes

[jaykay]

Here are my rotor thickness measurements:

LF: 1>27.38mm 2>27.35mm 3>27.44mm limit:26mm?

LR: 1>23.63mm 2>23.65mm 3>23.66mm limit:22mm?

RF: 1>27.48mm 2>27.42mm 3>27.25mm limit:26mm?

RR: 1>23.65mm 2>23.56mm 3>23.54mm limit:22mm?

How much longer can I expect these rotors to be within spec.? Are my limits correct? The car is not a dedicated track car; won't be anytime soon; hard braking on street. Generally it looks like I am playing with 1.5mm and that is it! This could only be half life but not sure

I ask as I am all jacked up and wanting to pull the rotors off and clean them up; paint as they are throwing rust every where