For complicated canopies in any scale, I use a time-consuming but easy to do scheme- I mask each line seperately- two usually parallel pieces of tape-paint-when dry remove tape and move on to next line. It works in 1:144 canopies and windows/windshields too. I use the narrowest tape I have on hand, but width is really unimportant, as you can cover up previously painted lines, or ones to do later. Painting is by brush- I see no need to airbrush really narrow lines.