All I've done is wipe it off with Windex. Contact me if you need a quote. All items sell as is where is. If you have any questions please ask prior to making an offer.The item "ORIGINAL Antique BIG Vintage 9' FIRESTONE Bowtie Tire Sign Car Truck OLD Gas Oil" is in sale since Monday, December 2, 2019. This item is in the category "Collectibles\Advertising\Merchandise & Memorabilia\Signs\Original\1930-69". The seller is "antique_illumination" and is located in Indianola, Iowa. This item can't be shipped, the buyer must pick up the item.