I installed a 3/4" x 5" white oak all quarter sawn plank floor in an existing home a few years ago that had this problem. We stained the floor with a quick dry stain, sealed it the following day with a quick dry oil based sealer, then screen sanded and recoated with BONA Traffic. I was doing all our jobs with this same method for 5 years, and not had this problem. I was surprised to have problems because of the dimensional stability of the quarter sawn flooring.
So what we did was switch from the oil based sealer to Bona Amber Seal, and we've not had a problem since. Apparently the oil base sealer was not elastic enough to allow for the movement, thus causing the white lines.
So what we did was switch from the oil based sealer to Bona Amber Seal, and we've not had a problem since. Apparently the oil base sealer was not elastic enough to allow for the movement, thus causing the white lines.