Q: My home was built in 1972 and I have a hardwood floor with narrow strips. I refinished the floor 10 years ago. Most of the floor has held-up well, but you see the cracks between the boards. Is it possible to use a heavy gloss finish like Marine finish #13 so the floor would appear solid?
Or would the cracks reappear later?
A: More or heavier coats of finish can actually make such blemishes more noticeable. If you feel the floor is stable, with decent environmental control, why not apply a wood filler to the cracks and do a buff and re-coat?