I just read a post about using an engraver to mark all the parts before priming so it will be readable after cleaning and priming. Isn't that a no no? I thought any scratches etc., could lead to stress cracks. Someone please hep me out here.
Bill
I am not close to my instructions to give you a reference, but Van's instructions does allow using a vibrating engraver.
Here's a fourth approach. With either the original Vans markings or my own Sharpie markings, I take a picture of the part(s) with my iPhone. Then clean with Extreme Simple Green and 99% Isopropyl Alcohol (separately), acid-wash with Alumiprep, and Alodine.Pros and cons - but at least there is a third approach to the issue.
To permanently identify individual parts with tell-tale marks that will never wash or fade away, industrial users including airframe shops commonly rely on some type of engraving pencil. An assortment of key parts included in our RV kits are often marked with such a tool. In operation, the rather loud sounding vibrating tool "peens" the surface of the material, it does not remove anything. Shown below is my example. I wouldn't be at all surprised if Van's uses this pen or some other brand of electric marker to permanently identify many of its own parts.....about using an engraver to mark all the parts before priming so it will be readable after cleaning and priming....