Digital BW, The Print

Don't know what the original questions was, but I have used artist's 
wax (low temp wax for encaustic painting) on canvas pieces. The net 
effect is a "film" appearance over the image leading to a lowered 
D-Max. The use of wax on a print would most certainly be for surface 
effect only (with the advantage of pigment protection as a secondary 
consideration).

Hal Gage