I started w/ 40 grit U-Sand and then used the Porter Cable w/ a 40 grit to do the edges. At times I really had to work at the edges, even turning my Porter Cable at an angle to the floor to concentrate on tough problem area right near where the quarter round will go.
I then used 60 grit w/ the U-Sand all the way around..... the U-Sand gets right up on the edges, unlike a drum sander.
Next was 100 grit w/ the U-Sand including baseboard areas.
And finally 100/120 foam-backed finishing pad w/ the U-Sand all the way around including the baseboard areas. (I'm not staining, very hard to see fine scratches even under bright light and 6in away from floor)
I noticed white/hazy/cloudy marks on a lot of the baseboard areas. Here are photos of the flooring meeting up with the stone fireplace:
This area was especially tough as I had to be very controlled in walking the Porter Cable hand sander up to the stone so as not to mark up the stone itself, but get the old finish off. I definitely angled the hand sander here a lot for extra control. This was all done with the 40-grit and then with the U-Sand went over this area including all of the rest of the floor with the higher grits.
So I figured I just didn't take enough time to get out the 40-grit marks on the baseboards. Last night I put on 150-grit paper on my Porter Cable hand sander and it made it worse....it just seemed to extend out the white haze ("photo 1 (3)").
Any suggestions? This 1030 sq. ft. is kicking this newbie's butt!
I am not familiar with the sander you are using but it looks like a difference between the scratch pattern between the 2 sanders. We usually use the belt sander, then the edger. We will have this type of halo. Then, we get out the buffer. It tends to blend these scratches together and the halo will disappear.