Marbling, glazing, and other finishes in the Victorian age

A number of sources talk about how marbling, glazing, and simulating woodgrains came into high demand in the late 1800s. I can imagine a new class, doing the Grand Tour or hearing about the ruins of Pompeii and wanting to reduplicate that in their homes. So who would they turn to? "Fine" painters? Or did it go the other way?

David Roberts (24 October 1796 – 25 November 1864)started out apprenticed to a house painter and decorator, moved to Perth in 1815 to become one himself and then went on for a while doing set decoration, interior decoration and other house painting.

It wasn't until later in life he started doing "fine art", so he doesn't quite fit the profile of the leading painters the New York Times told us were switching to decorative painting, but his eye for a dramatic wall is evident from this work from 1832: