Ceramic
Ceramic, Porcelain, & Glass is a non pourus surface that will not
sand to a required dull
surface
as is needed in most refinishing jobs. This is necessary for the adhesion
of coatings
to be applied.
Thanks to technology, we now have Acrilic Coatings that is designed to stick to Glass, & Bathtubs,Ceramic Tiles, etc.
We also remove stains that cannot be removed by the best cleaning crews,sometimes the surface is so worn that resurfacing is necessary.
MAYBE YOUR BATH TUB OR COUNTERS ARE FIBERGLASS