Only just started reading this - and plenty of lessons already learned. Should be read by everyone before starting on painting. Especially if it is a high quality model. Unfortunately bow pens are now almost an item from the past. Some used ones can be tracked down on EBay. I'd suggest contact Haff in Germany - I eventually raised a response and now waiting for the pens to arrive. You must definitely practice, practice, practice with the pens before doing anything serious, and find a cheap bow pen to do your practicing. Happy painting and 'Clean Lines'