No, sorry I don't have any you tube tutorials......I take too long when I'm painting and it wouldn't be riveting viewing!!! I only use a touch of gouache and limit it to white, sometimes mixed with watercolour where I need stronger opaque colour particularly in highlight areas. I build up my colours by overlaying a series of watercolour washes over my initial ink or pencil drawing. You can be very experimental in your approach and achieve some weird and wonderful effects, and that is part of the attraction to the media, but my personal preference is to use paint in a more controlled fashion.