I live in Guilford County, North Carolina and have been collecting and studying local Longrifles for many years. The Jamestown School loved the look of tiger striped maple wood on their Longrifles. I have owned many excellent examples and posted some of them on this site.
If a piece of wood did not have natural striping, they would often add artificial stripes. Some are very clumsily done, others are so good it is had to tell at first glance. I have owned several examples that were painted with a brush. The best, I believe, were done with a piece of twine or a string that was soaked in acid or Aquafortis and then wrapped around the stock.
Here are a few photos of my Jamestown Longrifle by Bartlett Yancey Couch. He was one of four Couch brothers to work as a gunsmith in this school. His rifles are very rare as I have only seen three of them in the last thirty-two years. The side plate on this rifle is signed by James "Duck" White, who was a journeyman stocker who worked for several Jamestown gunmakers in the later half of the Nineteenth Century. I believe that the rifle was made in Couch's gunshop and was probably stocked by Duck White.
This rifle started life as a flintlock and was converted to percussion during the period of use.
The artificial stripes on this rifle are well done. They fool the eye. I have seen better, but also owned some not as good.