I got some old Coca Cola embossed bottles at a flea market and they are in decent shape but am wondering how to clean them, without damaging them in any way. They both have a greenish tint. I am wondering if I should scrub the glass, use warm soapy water and what type of soap is best to use, and is it okay to use a scrubbing rag to try and buff/polish the edges of the bottle around the bottom where there is a bit of wear. Thanks.