hardwood floor sanding w/diff't grits- affect finishing?
Hi, (I figured woodworkers probably easily know the answer to this, though it's about wood flooring.)
I'm in the process of sanding my oak hardwood floors with a rental sander, using 100 grit. They were totally re-done/taken down about 10 yrs ago, so I'm trying to get out scratches and get a clean, new poly finish. Some scratches are deeper and I've been using my hand sander w/80 grit trying to get them out.
The poly previously applied was pretty worn out in a lot of places and wood not sealed, (I've worked on the place a lot unfortunately AFTER the floors were done) - so altogether
I'm concerned now about what it will look like with the first coat of polyurethane on it. Does the underlying finish need to be totally uniform - to have a uniform looking finish? Is there a sealer or conditioning product I should use that might insure that?
THANK YOU very much for your input and advice.