PA 24 ( I suppose that is synonymous with the Piper designation for a Piper 24 Comanche, nice airplane I flew a 260 B for a number of years myself). In discussions with Dr. Oscar Gaddy the subject of case colors fading came up. His explanation made perfect sense. Case colors are the result of attaching carbon molecules to the base metal through the application of heat. There are only three possible ways to dislodge these carbon molecules, friction, chemical action or sublimation and since carbon cannot under room temperatures pass from a solid state to a gaseous state, chemical action (oxidation/rust) loosens the bonds between the carbon molecules and changes the color but friction is the only possible way to destroy (remove) the case coloring.
Last edited by TwiceBarrel; 09/29/11 01:13 PM.
