I stand corrected on the shifting rail leaving bare spots bit. That was in fact, my Atlas track when I moved it after painting it.
Funny thing, though... Yesterday I was driving through Kearneysville, WV next to the B&O (CSX) and it looked like they are prepping for tie replacement... dots of white spray paint on the rail web over just about every other tie. Shoulda snapped a picture as yet another example of Ed's Law...

Lee