Once the first coat of stain was dry, a second coat was added. The old fir floors soaked up the stain really well, so it only took two coats of stain to achieve the depth we were looking for. After the second coat was dry, we went over the entire floor with a dental pick and vacuum cleaner to pry out any bits of old paint or debris that was stuck down in between the floor boards.
Also, at this time we used our acrylic paints to paint over any light colored areas of paint that still stood out after the staining process.
Floor almost ready for the clear coat.