My sealed CH system is now a lot healthier. I've cleaned, flushed and
inhibited it. The radiator in the bathroom has rusting along the bottom
and the white paint is flaking away. It this just cosmetic or do I have a
problem looking up? Is it worth the hassle of trying to clean and repaint
the rust, or just replace the rad? If it's just cosmetic, then doing
nothing is an attractive option.

Dougie