As wood ages it oxidizes at the surface. We call it Patina when it happened on a fine violin or a piece of furniture, but when you have a ghost image on your floor its not so great.
The area under the rug didn't get the light & oxygen to make it age or oxidize the same as the uncovered area so you usually get a light ghost of the rug and a dark outline around it
.Other than sand & refinish, only time will heal this.
If you remember science class this will have about a 6 month "Half Life" half the shade difference will be gone in 6 months & then half of that in another & so on. But it will always be there if you look close enough.
Unfinished hardwood floor easily absorbs moisture. To remove mortar stain on it, blot the stain with dry towel and sprinkle affected area with baking soda. Dip brush in white vinegar and scrub the stained area.
The secret to getting a juice out of hardwood floors is to try to get to the stain before it sets into the wood. A water and vinegar mixture can be used to remove a juice stain from hardwood floors.
Depending on how deep the stains on your hardwood floors. If you have a stain that is recent, you may be able to clean the floor with hardwood strip cleaner, if not then you may have to restrip the floor.
If the air is moving & dry probably overnight
Yes you can as long as you are not concerned about damaging the underlying floor. If the floor is old and the finish in unimportant to you, you are fine. If you are looking at steam cleaning an area rug which is on a hardwood floor, that's a definite no-no and the as the water and steam can stain or buckle the hardwood.
Possible answer from www.vinegartips.com/cleaning/Remove white water rings from wood with a solution of equal parts white distilled vinegar and vegetable oil. Rub with the grain.
There is no mixture using hydrogen peroxide to clean dark urine stains on a hardwood floor. However, you can dip a rag into hydrogen peroxide and allow it to sit on the stain for about 10 minutes.
First you have to prepare the surface, by cleaning it and removing any objects. Next you must sand the floor. After sanding removing the sanded particles. Then you must stain the floor.
pool acid on brick pavers works well to remove almost anything. Depending on the extent of the stain, the acid can be mixed with water, applied, scrubbed with a wire brush and rinsed with a hose pipe
Hardwood floors are very durable and to make them last you want to make sure that you take care of them properly. To refinish a floor you must first sand or buff it to remove the old finish and stain that remain and make sure this is done in the direction of the boards. This will probably need to be repeated a couple times to remove all the gloss. Vacuum and once the floors are clean you can then apply your stain. This will need to be done three times and in between hand sand any blemishes out of the stain. Make sure to let it sit for 8 hours in between staining.
If, You have a stain on your floor, match it with the same stain. If you're matching a natural wood look. Coat the flooring with the same type of finish, example: oilbase to oilbase, waterbase to waterbase.
In my opinion, for bathroom floor register, the painted metal one is the best choice, because it is always wet in bathroom. While for living room and bedroom, the hardwood floor register is the first choice, because it is easy for you to stain the floor register to match your flooring and room design. Hope it is helpful for you. And I have found a wonderful online store for hardwood floor register, http://www.floorregistersstore.com/default.asp, if you have the need, you can visit it.