I've had to access these bolts when removing a door to replace the worn hinges on a longer heavier coupe door. If you unbolt) the fender (large sheet metal screw with hex head at the bottom rear - I believe this is integral with the mudflap brace - you can then access the bolts. Granted this is easier with the car up in the air. You can then get to the bolts without damaging the fender or paint
I believe that I took the door off the hinges and then the hinge off the body. For your purposes you just want to loosen the bolts enough to tweak the hinge on the body. Doable.