Apply a coarse-grade sandpaper to the entire piece of furniture to remove the rest of the paint from it. Simply painting over it is another option, but stripping the partially stripped furniture lends to a smooth all-over texture.
You may find that the unpainted tone of the wood or other material might be better-looking than the painted product. If this is the case, polish it and enjoy.
Dab a rag in paint thinner, or turpentine, and use downward sweeping motions to remove spots of persistent paint.
Resurface the piece of stripped Ikea furniture with your choice of lacquers or polishes that correspond with indoor furniture. You can express your creativity here, or opt for recreating the original paint job. Use paints and glosses that are approved for the materials you're surfacing.
Let your refinished Ikea furniture dry in a well-ventilated area for 24 to 48 hours, assuring that the paint is dry enough for the item to be functional again.