You probably can't wait to get rid of ugly brown or rust-colored
stains, but hold on – those stains are trying to tell you
something. Stains usually are caused by leaky roofs,
walls, or plumbing pipes. Be sure to make all necessary
repairs before trying to remove or paint over stains.
Apply the stain
remover to a clean, dry cloth, and then rub the
cloth over the stained surface lightly to remove the
stain.
Seal all the stained
areas with white pigmented shellac or a stain
blocker. Pigmented shellac and stain blockers are
designed to prevent stains from bleeding through the
new paint.
Apply the stain
remover to a clean, dry cloth, and then rub the
cloth over the stained surface lightly to remove the
stain.
Seal all the stained
areas with white pigmented shellac or a stain
blocker. Pigmented shellac and stain blockers are
designed to prevent stains from bleeding through the
new paint. 
