I know of a youtuber I watch that has had silver hair for a while. He made a couple videos explainin the process of going from blonde to silver. Here are the links!
Explaining video: http://www.youtube.com/watch?v=zh-nB...feature=fvwrel
I hope this helps! ^_^
For daily cute lolita/fairy kei/decoden/etc pictures, check me out on tumblr as sugarcoatedkawaii.tumblr.com ~^_^~