Under the front wing looks quite clean. All I've done is lick over the caliper with a bit of gold paint, and touched up the black.
Note how the main spring has stayed very clean.

Some of you will recall that I had to enlarge the access hole because it did not align with the level plug. You may also recall that the heat insulation had not been cut, so despite three dealer services, the gearbox oil level had not been checked. My Dremel made short work of this.

The Getrag gearbox has a specific oil requirement, which took some finding. When I found some a few years ago, I stocked up!

My gearbox fill routine - very tight access.

And here's my replacement plug:

And that's as far as I got today.
