Cut the top of the hutch off using a jigsaw. Cut as close to the top edge of the bottom section as possible. Discard the cut-off section or save it for a future project.
Sand the cut edges of the hutch using medium-grit sandpaper.
Place the bottom of the hutch in a well-ventilated area, such as an open garage. Use a paintbrush to apply a thick layer of gel paint remover over the top of the hutch. Use even strokes going in one direction.
Let the stripper sit for 15 minutes or as indicated by the manufacturer. Avoid letting the stripper dry out. Once the painted surface begins to wrinkle, rub the surface, using steel wool, in a circular motion to remove the stripper and the paint.
Repeat Step 3 and Step 4 to the sides and front of the hutch until all the paint has been removed.
Apply a lacquer thinner to the surface of the hutch to remove any trace of paint and paint stripper. Because thinners vary by manufacturer, always follow the printed directions for proper application. Leave the hutch to dry for 48 hours.
Brush an outdoor, waterproof sealant onto the surface of the hutch. Use a thin layer. Let it dry for 24 hours, then apply a second coat for full coverage. Let the second coat dry for 24 hours before setting your tank up on top of the refinished hutch.