2931. Vintage 1970s Martin Guitar Polish Can ? Full Metal Spray w/ Cap Collectible. It weighs 7.1 oz. The contents on can say 6oz So maybe not totally full but close. Please look at the pictures. Always consider offers. This vintage 1970s Martin Guitar Polish spray can is a rare metal can version, complete with original cap and still full. Produced by the legendary C.F. Martin Co., this collectible is a must-have for fans of vintage guitar care products, Martin memorabilia, or retro music accessories. Perfect for display in a music room, guitar shop, or vintage instrument collection, this spray can is a true piece of guitar history. Shows minor age-related surface wear but overall well-preserved.