I’m not talking ‘battle-scars’ though - I just get over those and let them be, often an attempt to disguise a ding or scratch just makes it worse, so I don’t try to disguise those. But personally, I intensely dislike dirty instruments, and I prefer to keep mine clean and hygienic - when I see some of the grunge and shite that some people allow to build up on what would otherwise be nice instruments, I could vomit. Not my style, they’re welcome to theirs.