I have to replace the brake pads pretty soon, and I pulled off the left
front tire just to check and have probably ~2mm left. If I buy the pads
and do it myself, that means that the rotors won't get resurfaced. Can
anyone tell by these photos whether the rotor "needs" to be machined? All I can do at the moment is assume that the inner face looks about the
same.

If only I had a lathe...