Siding
My sister is here this week and I thought I'd have her on something pleasurable, like painting. It wasn't to be. Drywall installers worked 3 days to get the gorgeous smooth texture I wanted so the interior was still drying.
So, next best thing. Siding stain! I opted for an acrylic, water-based stain. Using a spray gun achieved the best coverage because we could spray it on really thick then use a 3" brush to float it in the cracks and cover the exposed ends.
All in all, it went pretty quickly but I think we still have stain in all our clothes. Badge of honor, right?