Today I woke to the morning sunshine, filled with vim and
vigor, aka ambition. With it being my day off, I was determined to get things done around the old homestead. I decided I had enough with mild attempts... Yes, I decided to go on the offensive with the living room floor in our humble little home. No more Mister Nice Guy!
First every stick of furniture in the living room had to be squeezed into two bedrooms, and some went out the door to set in the backyard. Yes, I was going to get things done.

Next, since I was already expecting to scrub the wood floor within a inch of its life, I may as well mop the bathroom and kitchen as well. Why pass up killing two birds with one stone, right? So some of the kitchenette set went out the back door to join the others as well. It was starting to look like I really meant business now.
My brother, a.k.a. Brother Dear had suggested that a floor sander would take care of my floor situation. But for a while I've been doing a little bit of atomic research of my own for ways to remove
stubborn water stains from wood floors... ever since the icky old carpeting was torn out last year. One idea is to use household vinegar, another is to use bleach, and if all else fails, try
oxalic acid. Though I had my doubts, I chose to go with vinegar first, just to see what would happen.
After three applications, I discovered that the only result was that my house now smelled like a Subway sandwich restaurant.
"What did you do next" you ask? Not to worry, I shall tell all in due time.
I passed on the use of household bleach. Too risky, I thought. With my luck the floor would turn pale white. Not a very appealing image. So I trucked on down to the local Q.P. Hardware after having a Kids Meal lunch with my Junior at school, and picked up a small tub of
oxalic acid crystals - a bleaching agent safe for treating stains without bleaching the natural color of the wood. Mind you, this stuff is
poisonous so please treat it with utmost respect (eye protection, adequate ventilation, rubber gloves, etc...)!
The day was already half over. I dumped the crystals in a warm gallon of water and used the hard-working mop for application so I wouldn't have to handle the acid. And so I began mopping the wood. And mopped. And mopped. Scrubbing it repeatedly into those nasty stains. After four applications (waiting at least ten minutes between each) the floor was then gone over with a wash of plain water, applied three
separate times to remove the acid.

The verdict: My wood floor did indeed lighten up, almost to the natural wood color. And a few discolored spots lightened right up. But (and there's always a "but") those mean old dark water stain rings lightened up only slightly.
Definitely not enough that I'd dare think of refinishing anything yet.
Anyways, to cut a long story short... a thunderstorm moved in as the final wash was still drying. All our valuable goodies outside had to be rushed back inside as the rain drops started to fall. Now the furniture is almost all back in place. I haven't felt good all night (*gasp*
oxalic acid poisoning??? Or maybe it was that second fast food cheeseburger for the day topped off by a treat at D.Q?) ...And Brother Dear still thinks I
should have rented a floor sander.
Oh well...
Some days it just doesn't pay to be ambitious ;)