Thanks for the insite into US terminology, it is what I thought it was.
Many years ago I had a stock that a guy had saturated with linseed and given up on it.I had this grease thing buzzing around in my head so I thought I'd give it a try.I used the basic everyday yellow coloured general purpose grease, daubed it on and rubbed it around, left it for 3 or 4 days and then rubbed it off and then rubbed the stock finish out.It turned out quite nice, dark, possibly due to oil saturation, but hard and satin shiny, the owner was pleased, and so was I that I had rescued a stock finish from a mess.