Scratches on Furniture ?

Have scratches on your furniture? Here are some ideas that might be helpful and we have tried all but the maple one time or another and the work.
-For walnut furniture use the meat of walnut. Break the nut in two and rub the scratch with it.
-For mahogany rub the scratch with a dark brown crayon and buff it gently.
-For maple combine equal amounts of iodine, and denatured alcohol. Use a cotton swab and dab scratch. Then wax and buff surface.
Haven't tried the maple so I can't make any guarantees so test a spot first. As for the other two. We have tried them.