Have you tried putty? I'd try some squadron green, or such. Not Testors tho. And I'm not a fan of using superglue to fill stuff either because you have to have the timing just right or it goes too hard on you.
That's just not a good model to begin with, so don't beat yourself up trying to make it perfect. All those sguares of raised plating look kind of bogus too. If you are worried about sanding them off near your surgery, don't be. The whole hull should be sanded smooth once you get it put together. At 1/600 you can most easily achieve a plated effect with masking, even with rattle cans.