The Start of my questions, Inner fender repair

Ok, I was just thinking with the angles behind the shock to the frame at the bottom it would be easier with a pre bent piece but maybe it is just as easy to make the whole patch from scratch. I will try to get some pics tomorrow
I would think getting the undercoating cleaned up on the back side would be something you would want to do because when you start welding that stuff starts bubbling and melting and catching on fire...