Don safety goggles and face mask and sand the bookcase with coarse sandpaper to remove old paint or varnish finishes. Go over the wood again with fine sandpaper.
Apply colored latex paint to the bookcase, brushing it on lightly, leaving streaks with bare areas. Allow paint to dry.
Apply white paint over the colored paint, leaving plenty of brush marks and streaks. Let it semi-dry, then use a cloth dipped in denatured alcohol to rub away some paint. Go over the entire bookcase this way, and allow it to dry.
Apply gel stain with cloth, rubbing lightly in a circular motion. When dry, apply a thin coat of varnish.
Wearing safety goggles and face mask, sand the bookcase completely, first with coarse sandpaper, then with fine sandpaper.
Paint the bookcase with one layer of colored latex paint and let it dry completely.
Wearing rubber gloves and safety goggles, mix a cup of lime putty into a half-gallon of water and stir well.
Apply lime on top of the paint on the bookcase with either a paintbrush or a cotton cloth, leaving plenty of brush strokes and streaks. If too much lime wash is applied, remove some with a clean dry cotton cloth.
Sand the bookcase well with coarse, then fine, sandpaper while wearing safety goggles and face mask.
Paint the bookcase with colored paint and let it dry.
Apply the crackle finish with a paintbrush. Leave brush strokes and gaps in the application so the undercoat of paint is visible through the crackle, and allow it to dry.
Apply the crackle sealer and allow it to dry.