What lies beneath

There are a few rusty areas on the car (the underside and chassis all appear to be pretty good) and a few dents that will need looking at. One on the bonnet is particularly annoying. I decided to make a start on some of the areas underneath the front wheel arches as they are probably the worst bits on the car for rust and any mistakes made can be rectified (or not) and its out of harms way. I need to practice a bit before I take on the few areas that are on the outside of the car especially the bonnet.

Inner front wheel arch. Not a pretty sight

Started by sanding the lip of the inner front wheel arch and got down to bare metal in places then skimmed across with some P38 filler before sanding again with 600 grit paper. Not sure if this is exactly the right way but like I say its out of sight and a good practice. What I dont want to do is take the whole bonnet off and tackle it all in one go as I still want to drive the car as often as I can.