I'll go one better than Sally Hansen's. Sharpie gold or silver marker with a fine tip. Get the rod aligned as you like it and one quick tap with the marker and you have a subtle alignment dot. Rubbing it with your fingernail will take it right off when it's time to sell the rod as the rod finish doesn't let the Sharpie "stick" like it will to paper or clothes. You can increase the subtlety of it by matching the color to the accent color in the thread wraps.
Brian
"My father was very sure about certain matters pertaining to the universe. To him, all good things - trout as well as eternal salvation - come by grace and grace comes by art and art does not come easy." Norman Maclean, A River Runs Through It