That's a neat piece again. To solve your drawing vs. painting dilemma, you might want to try these amazing German watercolor pencils:
https://www.faber-castell.com/search-result-page?q=albrecht+d%C3%BCrer
They're not cheap but the results can be stunning! Watch Cassandra Hanley put them to work below. Have a wonderful weekend :)
Wow, those are some really great pencils!!! :D Thanks for sharing~
Hope they work for you :)