I recently saw some of Michael Eastman's work in a Chelsea gallery and his finishing technique is exquisite - I wanted to try something similar.
Eastman's coating techniques give his work a tactile quality that is usually completely missing from photography, and which hugely affects the appearance of the print. Painters will immediately raise flags about "aping painting" but I have yet to find the patent on the use of canvas or glazing finishes and would rather think of the presentation of a piece for its own sake. I have been experimenting with super clear varnishes on canvas, which opens up the option to profile targets in their coated states which greatly increases the gamut range available from a given canvas, although not necessarily in useful color ranges. Wonderful things start to happen just short of the point where the glazing starts to smooth out the canvas texture, provided there is sufficient transparency left through many layers of coating, now there's the problem. PS, lighting has a lot to do with the appearnce of glazing.
Here's a page that talks about Rembrandt's glazing techniques which Eastman has sometimes referred to.
http://virgilelliott.com/node/19And Eastman himself is pretty impressive with or without tactile surface qualities. The greens and reds in his work are examples of colors brought into gamut range by profiling varnished targets.
http://www.escapeintolife.com/artist-watch/michael-eastman/