This is response from cheek-eez after posing that question. Cigarette lighter fluid is recommended. You can also get products from Walmart for label, sticker and adhesive remover, look for Un-do, Oops or Goof Off. Goof Off on Lowes shelves is recommended for removing adhesive and glue, asphalt & tar or dried Latex paint. If you use some other product stronger than alcohol, you should test it on the bluing under the barrel in an inconspicuous spot; likewise on gunstock finishes. The Un-Do web site will give you good information about their product. Bluing is generally quite resistant and hard to damage.