Penal Code Section 249
Altering appearance of coin with intent that it shall pass as a coin of a different description
249. Whoever performs on any coin any operation which alters the appearance of that coin, with the intention that the said coin shall pass as a coin of a different description, shall be punished with imprisonment for a term which may extend to seven years, and shall also be liable to fine.
Please refer to the Attorney General's Chamber of Malaysia's website for the latest law.