How to Choose the Right Paint Finish: Flat: Ceilings. Eggshell: Bedrooms, Living rooms, Dining rooms. Stain: Kitchen, Laundry Room, Bathrooms, Hallways. Semi-Gloss: Trim & Molding. Kitchen Cabinets. Doors. Woodworking. Gloss: Used often on furniture for a lacquered look.
Perfect paint lines: tape 1/4 in above and below ceiling line. Caulk in between, smooth out with finger. Carefully remove tape before caulk dries. Perfect line, impossible to tell it's really caulking!