UBB.threads Forums Edged Weapons Rohm Dagger Forum Clean or Not To Clean.

Hello,Last summer I purchased a partial or Lazy Man ground Roehm(#SAGPR-001) from Tom Whittmann;the first in that category on his list--pictures stillthere-would have left a link but don't know how.I love the dagger and you can see a lot of the dedication but the fittings are all covered with nicotine.The dagger is gorgeous and untouched but does this harm the fittings or if I clean it ,will this screw up the value? Your opinions are valuable.Thank you.Hugh.