The windscreen base finishers
are prone to rust, usually from the inside out, so it is always a good
idea to prepare the back of a new one with a stoneguard type of paint
before fitting to prolong life. When these are received from the Supplier
they often come in the perfect satin black colour required. However
it would be wrong to put the finisher straight on as this is just a
factory coating to prevent rusting during warehousing and is not a suitable
finish to stand against the U.K. elements. Therefore the finisher needs
to be rubbed down and sprayed satin black, the more coats the merrier.