There's always the Yardbird Chicken Plucker(after scalding the bird real good to clean and soften up things).
It looks lik a small washing machine ,built for spin cycle only, and full of rubber fingers that do the plucking.
Looks like it's takes all of 5 seconds to do the job( for a chicken). Could be there are designs for duck with their many more feathers.
Cabela's has a vid "How to pluck a duck" involving wax to get the feathers and down.
"Can't make the "Tee" time, today, gotta wax my duck."