After two more Bondo applications, and a thorough sanding, we have a presentable window sill:
For those of you who don't remember, here's the "before":
It needs primed and painted now; this will wait until we decide what color/brand to use on the rest of the house. I'm not convinced that the original color (the dark brown on the window) is what I want... I'd prefer something with a little more "color".
Finally a project COMPLETED! (First one for this blog?) Off to work on the front door today, which had been neglected in the last few months. It's slow going... not a lot to show for my work!