a lover's eyes
in the morning
as the light grows
twin blue pools
appear out of the gloom
the colour of a clear winter sky
when a storm brews
the color of the deep winter sea
My vote is for drilling a hole just slightly smaller than the diameter of the screw, down through the center of the screw then breaking off the head of the screw with pliers and removing the mounting ring. Then using a self-tapping screw to replace the old rusted one, slightly enlarging the hole...