I've mentioned this already, but we were unable to match the already-installed hardwood - they don't make it anymore. However, this really wasn't a big problem because the plan was to refinish the existing floor to a darker and richer color. So, we took the cheap-o route and purchased all of the unfinished the store had in stock, which wasn't enough, and then the cheapest stained oak to cover the remaining square feet. There were three different finishes of floor when we got it all laid down.
We rented a heavy-duty sander from HD. And man, this thing can really take the finish off! Trust me, there were a few boards that I didn't move quick enough over and the sander took off a little too much. Oops! The wood on the engineered hardwood is thin compared to normal hardwood so it usually can only be refinished a few times, if you're lucky. No worries about the too-sanded spots. They were replaced with new boards by my handy dad, with minimal help from me.
Now comes the hard part - cleaning up. Dust will be everywhere. It doesn't matter how well you put up plastic, or turn the air off, or use fans and vacuums....dust will be everywhere. Just suck it up, literally with a vacuum, and get to cleaning.
Final step in our hardwood endeavour will be finishing it out with stain and polyurethane. Anybody have any experience with a heavy-duty sander? Maybe you can attest to the shear sanding power of one...