Robs' advice is spot on and, when I could be arsed, that was the way I prepped capes/rabbit skins etc etc.
I think I still have a light sussex cape somewhere, left over from my days when I bred bired for their feathers
** cough** just realised that was over 20 years ago
Light Sussex birds tend to come in a small variety of colours but usually have reasonably strong 'barring' in the centre of the feather, particularly towards the end of the neck and into the saddle. I suppose how much use they are largely depends on what colour the condemned birds are.
Seem to recall I dyed a couple of the cock capes claret, but the hassle was the fibres on the capes weren't up to much - essentially I ended up with an expensive version of a chinese quality dyed cape
Streamers and terrors would seem to be the best bet, unless the capes are top top quality
H