You could blow it out, wash it and then bronze it if you really wanted to keep it forever.
Anybody here fancy themselves chicken color experts? I'm wondering if a Light Brahma/Black Australorp Cross would create Black Sex Link chicks? I have a Aus/LB hen that hatched out this spring. I didn't pay much attention to the chicks coloring when they were young but this hen has got the gold feathers in her hackles like a BSL so now I'm wondering if the coloring is sex-linked as chicks, too?