Re: Neptune ID plate restoration

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March 21, 2017 at 12:56 am #54637
nali
Participant

    It looks to be copper based.
    Maybe ammoniac ?
    But not before a small test to be sure it doesn’t hurt the paint.

    Or simply Autosol, which also contains ammoniac.

    Some use electrolysis, but in this case it may be dangerous for the paint.
    Of course, the part must be grease free.

    http://www.metaldetectingworld.com/clea … s_p1.shtml

    http://www.metaldetectingworld.com/coin … ects.shtml