How do I hide screws on the side of a kitchen cabinet wall that has slightly countersunk screws? I will be painting my cabinets black.
You can use wood filler if you're painting the cabinets. Use a putty knife to apply, and then sand even after it dries.
Alternatively, if you're going to stain the cabinets, you can use a plug cutter that matches the countersink diameter. Using matching scrap wood, cut a plug that has a similar grain pattern, and lightly tap it in the hole after applying a thin layer of wood glue. When it dries, you can use a chisel to cut it flush or nearly flush, and then finish up with sandpaper. Then you're ready to stain!