well. I'm still not an expert, maybe nicalandia will chime in again.
but...golden usually means a heterozygous s+/S on male chromosomes
(half gold - half silver), rather than buff, when talking genetics
it can't happen in hens because they only have one Z and one W
If we are right and she's s+ you'd want silver to produce golden roos
as for duckwing... maybe she's half e+
maybe some of her chicks would express e+ rather than E^R
Maybe there are genes hiding out waiting to surprise you
cross breeds are a crapshoot but some of the surprises are good ones
play around with the chicken calculator
http://kippenjungle.nl/kruising.html
fun and educational and quicker than waiting for the next generation
Walt