Ta dah . . ! My new foglights . . .

[Kitch]

Today I have been totally soaked pressure washing the underneath of
the car and washing the wheel arches to reveal white paint.

Does that mean that you have blasted off the underseal with the ferocity of the pressure washer?

erm no, they should indeed be be white (see my TZi), albeit stone chip paint.

I think he's referring to the paint aspect, rather than the colour. But running with the original underseal without some black stonechip or similar is asking for trouble later on.