I have had excellent results with a little device called a "Liner"
bought at a paint specialty store or large art supply for that matter.
It consists of a small bottle with a lid that has brass wheels of
varing widths that can be adjusted so you roll paint with a ruler as
a guide. It works with all paint but I have found that Gold Leaf in two
shades stocked at Home Depot works well. You can even do double stripes
at the same time . I believe I paid under $5.00 for the kit.

Redards,
John McClure