Micky, I still don't know what you mean by Burnt, in the old days on Lacquer coated Lanes, they would Track in the highly used areas, this would cause the oil to sit on top of the finish and track out much like Synthetics do today, instead of the Porous nature of Lacquer which held the oil in tiny holes which kept the shot longer, this required the Lanes to be Polished to bring the Lanes back to a more usable condition.
I have seen Synthetics that have "Out of Bounds" out wide, which I believe is due to the Screws used to hold down the lanes on the edges causing a Wavy effect on the sides, which is very Visible to the Naked Eye but cannot be measured by a Feeler Guage.
willey