Your perfectly fine to paint where Daz has done if you make sure the contact area on the discs is completely covered and once you have applied the paint that you let it dry 'completely' before using the car again.
I did the micra and the corolla like that and if done properly there is no risk, from an looks point of view, if the brakes are left unpainted they will rust very quickly and look like rear drums un-painted.
one point, why highlight your car has rear drum brakes and also in a bright red like that?!?! your callipers look good done red, but surely a black would have been a better choice for the drums
Kev