I have a 1912 one story bungalow. It has three bedrooms, a tiny bathroom and a wonderful galley kitchen. It was neglected for years and was empty in foreclosure when I bought it. It has I think the original hardwood floors, however in all three bedrooms I had to pull up the rugs, the owners had let those dogs pee on them. My question is this, in the first bedroom where I started (it smelled the worst) I have sanded, it was already bare wood, it sanded pretty easy, I did it by hand with a small sander. The boards are about an inch in width and I really want to save them. I have heard that I should use a polyurethane sealer and stain it, then I hear not to use Polyurethane and leave it the natural color. how do I tell what kind of wood I have and what do I do know to seal it and restore it? This room also has the original wide wood base boards and window trim which also need redone. Any advice would be great! I am a first-timer DIY!