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.
This 5-pack of 4 in. ultra-smooth, high-density foam roller covers is a great value. They are recommended for use on any smooth surface and with gloss
4 in. x 3/8 in. High-Density Foam Mini Paint Roller (5-Pack)
6 In X 1/4 In Shed Resistant White Woven Mini Paint Roller With Frame
EveryMarket
Whizz Mini Paint Roller Frame & Cover Smooth 4 in.
Dust Pan For The Dust Bin, Seems weird that the Brits call a garbage can a dust bin. But is it any less weird that we call the things you sweep junk
WHITE METAL MINI DUSTPAN 8-3/4 WIDE
Wooster Sherlock 4 Roller Frame
Whizz Foam Mini Paint Roller with Handle - 4 in
Buy Titan- Paint Rollers, 4 Inch Paint Roller, Small Paint Roller, Paint Rollers For Painting Walls, Mini Rollers For Painting, Paint Roller Small, Paint Roller Frame, Wall Painting Tools Online in UAE
4 in. x 1/2 in. High Density Foam Paint Roller Cover- BEST Quality, 2 Pack
This reusable paint roller frame is 11 in. long and 4 in. wide. It's perfect for smaller projects. Allows you to get into tight confined spaces.
4 in. Mini Paint Roller Frame
Mini roller frame has a threaded plastic handle and a metal ferrule. Can be used with 4 In. and 6 In. mini roller covers.
Linzer 22 Mini Roller Frame
Brushman RFM4-16 4 inch Mini Paint Roller Frame 16 inch Handle Case, from Brush Man Inc.