It can probably be cleaned off but why, its history of the piece and doesnt show up anyway. The item "RARE Vintage NPI Neon Crosley Radio Dealer Advertisin Sign Excellent Condition" is in sale since Thursday, July 4, 2019.
This item is in the category "Collectibles\Advertising\Merchandise & Memorabilia\Clocks". The seller is "510guy" and is located in Winnie, Texas. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Chile, Colombia, Panama, Jamaica, Iceland, Maldives, Uruguay.