Another and more common way to transfer or freehand a pinstripe design is to make a basic grid square.
A stabilo pencil is a wax pencil that can be used on most surfaces and has the ability to wipe off the surface when complete.
I made my marks 1-inch apart to create a 1-inch grid square block. These marks help me balance a freehand design from one side to the other.
I cleaned up my brush using a 3 part wash system with Mineral Spirits in each wash. I finished off by bathing the brush in mineral oil before storing.
Watch the YouTube tutorial here: