[quote name='Shambo' timestamp='1327326644' post='1509305']
There's nothing pourous about the poly finish on any bass I've ever owned, or the glossy neck, shiney metal and plastic. If residue sits on them, I'll give it a wipe. Do nitro finishes allow smoke through to the wood? Does carbon fibre hold a musty smell when curry is eaten in the same room? I've already said I can understand unfinished wood might retain a smell but personally, I've never even held a bass made of unfinished wood, and if I did I'd be more bothered about the damp sweat and dirt build up in the grain.
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Good luck trying to "wipe off" the stench of smoke from the material inside a case. My mate's hardcase stinks so much you can smell it from several feet away when he opens it.
As for the guitars themselves- nicotine stains. That's why smokers get yellow teeth and fingers (even though they wash their hands and brush their teeth a lot more than people clean their basses)
Even assuming you can "wipe it off"- It would be like buying a guitar covered in caked on mud or grease. You might well buy a guitar in that kind of nick, but you'd certainly want to pay less for it!