Ys 760

[turbojet427]

To answer your question: VERY CAREFULLY. Haha. And they are there only once, so you got one shot at recovering them. Frank and I have developed several different methods of removing layers of paint, grease, dirt, etc. and different light sources to be able to identify the markings. So, a lot of it depends on the car and/or what the previous owners have done to the firewall making this possible. Doug’s Yenko had layers of paint added over top of a virgin firewall so we were able to recover a lot!