Many of the rod blank suppliers will send you some pieces of the blanks you are using and then you can wrap some test samples with the products and colors as well as color preservers that you use. You can then have these test samples always at your work station as well as available to your customers to show them what the finished product should look like when completed. Good luck.
Several years ago a friend and I both purchased some of the two-part rod finish packets from Cabela's. After use they never dried completely requiring stripping and re-finishing. It was a real hassle. Although Cabela's stood by the product and replaced the packets, I never used them again as I just didn't have the trust level there. I since have used the bulk dispensers without a problem since. This is not a bash to Cabela's, just an experience that I had that taught me a good lesson.
Kelly.
Tight Lines,
Kelly.
"There will be days when the fishing is better than one's most optimistic forecast, others when it is far worse. Either is a gain over just staying home."
Roderick Haig-Brown, "Fisherman's Spring"