Arches Platine paper (from England since I live in Europe) -> pure palladium + Na2 for contrast -> Pot. Oxalate developer -> three baths of citric acid ( 1.8 liters each with three teaspoons of citric, 5+ mins each bath) = prints come out badly yellowish, no way they clear properly, they're horrible. Blacks and everything else is fine, it's just the clearing. Any Arches Platine users could please share how do you clear this paper???
I've always used Kodak Hypo Clearing Agent (30grams per litre) with Arches Platine and have not had problems clearing, i tried citric acid baths initially but like you I was left with a yellow stain. Kodak HCA will do the trick.