Horizontal scratches

Freight cars get lots of horizontal scratches...

Photo by Stan Lytle, posted on RailcarPhotos.com

But it can be difficult to make them level. Here is a way to make nice level scratches.

I use disposable lip liner cosmetic brushes ( link ).

I mount one in a portable drill press vise to hold it secure, apply a bit of rust paint to it, then just roll the car past it.

I use acrylic craft paint, so if something goes wrong, it comes right off with a damp Q-tip.