A Dunalino is simply a Dun factor acting on a Palomino base coat, they tend to appear similar to a sooty in the legs but with no dappling that sometimes apears with sooty gene, then the obvious leg barring and dorsal stripe, but don't forget the shoulder shading and ear edging, Duns don't have to have a dorsal stripe to be dun, nor barring, just the tel tale dull color and shading on the legs and head. Sooty Palomino:
Notice the dappling, and dark shading (not always dappled but is dark) Dunalino:
Notice the cleaner shading with less of a dirt look (not always as clean.) Classic Palomino:
Notice the lack of any shading.