A lot of people like to hand paint dyes onto fibre because you can get some interesting effects. If you use darker colours, you get some really good colours , too. You need a good work space area and a place you can keep clean easily and then plenty of plastic and protective layers and rubber gloves. It doesn’t need to be messy but better to be prudent prepare for that eventuality . In the end it is fun and creative. WoolWench provides clear instructions.