Fit 120 grit sandpaper to the orbital sander. Sand down the large areas of the furniture with the sander using smooth, even strokes across the surface.
Fit 220 grit sandpaper to the sander, and sand down again to smooth the surface.
Wrap a sanding block with sandpaper and remove varnishes or stains from small areas on the furniture.
Wipe over the surface with a tack cloth to remove the dust.
Apply a wood grain filler to seal the open grain of rosewood. Water- or oil-based fillers are available, with the water-based ones accepting stain better than the oil-based ones. Always follow the directions on the can for the type of grain filler you are using.