By the early 1990s, Rwanda, a small country with an overwhelmingly agricultural economy, had one of the highest population densities in Africa. About 85 percent of its population is Hutu; the rest is Tutsi, along with a small number of Twa, a Pygmy group who were the original inhabitants of Rwanda.
1 Power sanding, stain and seal â This is a very aggressive procedure normally used on decks that have not been well kept or are changing color. The average cost is $2 to $4 per square foot.  Light sanding, stain and seal â This is a general annual treatment for a deck.
Refinish: Once the floor has been prepped and is clean, sanded 1 smooth, and ready for the finish the refinisher will stain the wood and apply two or three coats of sealer to protect and add shine. 1  Cost of staining is about $1.49 per sq.ft. 2  $535 for a 360 sq.ft. living room. 3  $215 for a 144 sq.ft. 4  The oil finish is $1.81 per sq.ft.