honestly? A brass wire brush can help but not much . I have used that on bronze , copper and with surprising success. olive oil and solvents don't really work.
http://www.forumancientcoins.com/Articles/Uncleaned_Ancient_Coins.html BRONZE COINS: As a rule, bronze should be cleaned mechanically (i.e.. with brushes, and toothpicks), and silver should be cleaned chemically (i.e., with ammonia). ... Use a small denture brush or soft brass bristle brush and brush them gently. FORVM sells a good brass brush made just for this purpose.
Sincerely saying, I don't know what is either SIMONIZE neither brass wire brush. My methods are very different.