My 500 had that type of trim, trouble is it tends not to stay on the tight bends even when bonded as mine was in the area by the steering column.
In the end I binned it so have no tank trim, had I thought it through I would have had it painted white where it fits.
The 400 does not have that trim so my 500 is now the same , not original or concourse but not bothered, only person I have to please is me.