Eggs won't stick to metal frying pan

Often no matter how much butter or margarine you put in a metal frying pan the eggs stick to the pan making it very difficult to make eggs over easy or just plain scrambled eggs cleanly. This problem can be overcome by burnishing the pan with salt before you start cooking. Warm the empty pan. Put about a teaspoon of coarse salt in the pan. I make a small pad out of a paper towel. Use this pad to rub the salt over the surface of the pot being careful not to touch the pot with your fingers. Then dump the salt in the garbage and proceed to cook your eggs as usual-with no sticking!