agreed Sandy...
most people think porcelain's sort of like another type of paint, whereas it really is essentially like glass, and perhaps somewhat distantly related to powder coating as both fired in an oven similarly, but porcelain is much much harder... and more expensive.I think these owners are probably unaware or under a mistaken impression, but in any event, yes they sure ARE pretty.
Custom Ceramics charges something like $1500-2000 to do a Model C color change (all panels), but presumably one could do a porcelain job on a wall oven/cooktop for considerably less, especially since Chambers provides an option for complete in-wall installation of the oven, instead of having the exposed sides and top as pictured here, so only the face/door of the oven, and front of the cooktop box, would need to be re-done, I'd bet for well under $500. Something to consider... hmmm...the myriad color possibilities are intriguing!