More progress. I'm a bit slow at this so no sleeping at the back!
I decided that the arches looked odd. There's a recess in the factory arch that didn't look too smooth to me so I set about filling out the arch to make it look smoother whilst also blending the front and rear bumpers and taking all the trim off.
Here you can see me running a strip of thin plastic card through my fingers to put a pre-curl into it so that it fits the curve of the arch.
Here's the first of four curves.
...and stuck in place. I repeated this with the other 3 curves (but I didn't take any fuzzy pictures of that). You can also see a bit of Squadron Green putty filling the gap between the flared arch and my curve.
With a bit of filling, sanding and more filling, it's starting to look better. The plastic card gave me a good edge to work to along with the original flare so with some gentle sanding I was able to get where I wanted to go.
More to come. Next step, figure out how to make my pictures bigger in the post!