My Roadster has the creamish hood interior. I use Meguiars exterior soft top cleaner but there's not much to chose between them.
I work on a small area with a nylon nail brush and wipe with a damp cloth. Repeat as long as it takes. I remove the head restraints but it gets steamy and hot ss you work.
To avoid watermarks I dry with a hairdryer but also mist it over with a waterspray.
I plan to put a clear protector film on the frame but so far haven't got round to it. I'm also tempted to recolour the inside black.
The stitching needs regular reproofing otherwise it leaks over the sidescreens. It doesn't drip but forms wet patches and watermarks.
The hood on my Plus 4 so far has shown no sign of wet patches and the black interior won't show watermarks.
