TimK
Contributor
I normally clean bottles I find in salt water in a mixture of vinager and water. Let them sit for a week or so in the mixture and most stains as well as marine critters come off pretty easily. For those stubborn areas, I drop it back in and let it sit in the vinegar and water for another week or so. I haven't tried this with anything that has a label on it though. I found an old Pepsi bottle but like the way it looked with the barnicles so left it as is. You can also get bottles "tumbled" which removes scratches and will make them look pretty much brand new. Good luck!