"mit Lack beschichtete Platte"
... simply implies a varnished surface to me.
Both speckig in German or fatty in English imply "not really clean" in my mind, rather than partly shiny. Am I way off base here?
Also: shiny, glossy, semi-gloss(y)
"Semi-glossy has the sheen level between 40 to 59 percent. Furniture that coated by the varnish with this level looks shiny but not too extreme. At this level, the wood surface has sheen level up to 60-79 percent. If it is exposed to the light in the room or outside, the wood surface will give more reflections"