I drew this livery and it took me more then 1 hour
What I did was that I printed the frame of the A350-1000 and I drew a livery onto it! Here's the link to the frame for the A350-1000 I use for my A350-1000 drawings: https://www.norebbo.com/airbus-a350-1000-blank-illustration-templates/ (copy and paste for the link to work)
