Paint A Little?
4 INCH WIDE MINI PAINT ROLLER
You'll need a little paint roller. This 4” wide version is made for painting behind radiators, inside cabinets and bookcases, and other tight spaces. Measures 13" long with a drip-catching handle and a 9/16” microfiber nap. Mfr says it’s good for any surface, and ideal for semi-gloss and high-gloss paints. Might as well keep a few handy, considering how little space they take up.