I think they actually do mean silica (SiO2) and titania (TiO2) particles in this case, since it's marketed as a ceramic coating and particles are specifically mentioned in the marketing materials. This is speculation, but most likely it's those ceramic particles (plus pigment?) suspended in some kind of curable polymeric resin. The resin suspends the particles, which provide strength, scratch-resistance, luster, color, and/or brightening. Synthetic chemistry, and language thereof, probably has very little to do with it. "Built on" almost surely refers to ingredient formulation, i.e., the active component is the ceramic particles. If it's a curable polymer resin as the suspension matrix, it will be pretty resistant to light solvent exposure, heavy exposure to organic solvent - or exposure to really aggressive solvents - will damage/dissolve the polymer host material and thus affect the surface characteristics and visual properties of the coating. This would be true for any varnish, be it furniture polish, wood polish, car paint, glass coatings etc. Most likely the particle characteristics and resin characteristics are proprietary but possibly not patent protected.