This is the way I add colour. The wax part of Pyrowax. At this stage I pick the colours I intend to use, even make new coloured blocks if need be. I use my encaustic stylus with an ink dip nib forced into the end. This allows me to get the fine detailed thin lines as needed. This nib has a large resevoir so even though it produces a fine line, it actually saves a lot of time as I do not have to refill as often.