Originally Posted by scarlson

The Taylors used a roller for Jack's paint work, as seen at 12:00-14:54 in this video. In the video you can see Jack doing his famous box lining, but I imagine he could have used it for lug lining as well. For the tinier curves, I imagine they would have had to use a brush. He does mention they previously had a man do it with a brush.

https://www.youtube.com/watch?v=ALNsQpCL8LY

Originally Posted by KenNC

I have seen several sources using the vintage ruling pen (aka drafting pen, draftsman's pen, technical pen), here is one example: https://www.youtube.com/watch?v=1Oo9WwzsR7g
I am attempting to use one now to do some lug lining but am not near as proficient as the guy in the video. Knocked over my can of one-shot just yesterday, sigh.....
In poking around, I see there might be more modern, refillable, technical pens, something like that might be worth experimenting with. Really seems like you could get thinner lines with these than with a brush:
https://www.jetpens.com/blog/the-bes...ng-pens/pt/436