So what is varnish? Generally accepted as a blend of:
-a drying oil
-solvent, and
-solids (usually resin synthetic/organic) ...which "dries" by curing.
The linked product is:
-Tung Oil (a drying oil)
-Naphtha HH (solvent), and a
-metallic drying agent (Cobalt(II) ethylhexanoate)... which "dries" by curing.
Yes the proportions are variable, and quality varies between Danish Oils, but it's still a
wiping varnish. An excellent, serviceable finish for a gun to be used in the field. It's what I use for the inletting in my rifles before I oil finish the outside.