See my response on the Discussions side.

I agree that it looks like a stress crack. The stress doesn't have to be from use of the furniture but can be within the metal itself. If this is not a major brand of patio furniture (you can get matching paint from the dealer) my personal approach would be to buy some acrylic/patio paint from a craft store, such as Michaels, and mix colors until you get something that matches your chair. Since the metal appears to be weathered, I would use a matte sealer on top of the acrylic paint (also sold at Michaels) to avoid a shiny repair spot. You may find you don't need any sealer, especially if the furniture is protected from the weather. The craft paints come in very small containers so picking up 2-3 colors to mix/match won't break the bank. Since the crack isn't on a joint I wouldn't worry too much about it. I think a tiny brush and enough paint to cover the exposed aluminum is all you need.

They're right, that's an installation issue completely. The window needs to be raised or the trim needs to be lowered - one or the other. While it's too late in this case, for other homeowners who read this thread, single hung or double hung windows that utilize weep holes for primary drainage should be avoided. Stick with sloped sills and stay away from pocket sills.

*places bag over head* :-/ I'm officially de-lurking to ask for help. I thought I had bookmarked the page but for the life of me I can't find it! Here is what I remember: It was a rental home remodel. Adorable old home they refinished wood floors re-created amazing woodwork around the windows (the original had to be removed). There were some cute simple scalloped edge window treatments of some sort. The kitchen had grey walls and home Depot white cabinets and there was a very narrow shelf placed next to the refrigerator. I also remember a cool curved wall and a mixture of paint colors in the various rooms, grey, yellow, pink. Officially..... Hello! I'm in the process of gathering ideas for a new build and the advice I've gathered here has been invaluable! Thank you!!!