You should read the painting instructions that came with the window. Usually if some wood is exposed, it should be painted and that includes the reveals that face the exterior. It's also important to paint the tops and bottoms of the sashes as that is where end grain usually is and moisture can enter.

Thanks very much for taking the time to answer. Unfortunately, it's a window I bought on Craigslist and don't have any instructions for it, but maybe I should call Pella and ask them. Funny, my first inclination is always to ask here rather than the manufacturer! Trust you guys more.

I didn't think it should be left as-is, but staining it probably wouldn't look good as the window looks like it's pine and my trim is oak. Figured painting it (like the rest of the kitchen's poor old trim) made the most sense. I did prime the exterior reveals (thanks for the terminology!) and left the ladder out in case I'm to go paint with the SW. That ain't a cheap paint, is it? But I've used it on other trim and it's awfully nice.

Thanks again, I love the experts on GW. Very helpful.

According to Pella, on casement and awning windows, paint, stain or finish the vertical sash edges.

I sell a competitive window and the edges are always painted or stained and sealed at our finish shop prior to install.

Michael

Perfect Michael, thanks for including the link. I'm good to go for this weekend.

Okay, not exactly looking forward to it, but hey. :-)