At least I don't think you can realistically overheat the Sun. :-) But I guess if you make the radiators reflective and hot enough they should still work to a

At least I don't think you can realistically overheat the Sun. :-) But I guess if you make the radiators reflective and hot enough they should still work to a even at Earths orbit in full sunlight ? Well, this is already in a "calculation needed" territor.