I have used these 2 along with a stripping brush with good results. For me the
large nib Kohinoor ink nibs are nice. They have an offset nib to barrel, so when making a paint lines you can use a thin piece of chip board as a guide for the stipe. The offset wont let the paint run under the edge etc. You will need to find the larger nibs and thin the paint a lot in order to gat it to flow. The Kemper might also be useful. see the pics for both.
If you have a steady hand (which I use to have) a pin-striper brush with guide would be the way to go because you can vary the lines width with up or down pressure on the brush.....either way practice practice practice.
BTW, I have sed "1 Shot " paint that is really thinned for application.
Here is a vid
Note the offset on the nib
Kemper is similar but a higher offset than the K
1 shot with stripe brushes
Best, Ben
BTW, If you want to cheat...theres alway pin striping tape...stick adhesive and go.