I have some Renthal bars and yes it is some kind of surface logo, unlike a laser etching or similar into the surface of the aluminium.
Have not atempted to remove this logo myself, but would suggest using a strong paint thinners and or a strong paint remover, stick with something that is used for breaking down paint types as this should not affect the anodized coating, and see how it goes. Maybe try first on the end of the bars so if things go south you at least have the option to hide any potential mess.
Avoid acids or similar as they may eat into the aluminium surface or at least effect the anodizing, though being black you have options like painting over, black tape and the like.
Further note, there are weak paint removers, the stronger types are usually Methylene chloride or dichloromethane based, these burn your skin and do wonders for your eyes but will usually get through most paints and stickers.
Cellulose paint thinners rather than white sprit or similar is a better type thinners to try.
Further note, there are weak paint removers, the stronger types are usually Methylene chloride or dichloromethane based, these burn your skin and do wonders for your eyes but will usually get through most paints and stickers.
Cellulose paint thinners rather than white sprit or similar is a better type thinners to try.