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How to prevent pitting on NOS chromed pot metal??
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56D500boy
Posted 2020-02-19 1:50 AM (#594501)
Subject: How to prevent pitting on NOS chromed pot metal??



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The other day I bought a very small NOS chromed pot metal piece for my 56 Dodge. It is really perfect (for now). Are there any strategies, e.g. a waxy chrome polish front and back, to prevent pitting from starting ?

I don't want to hear nothing can be done to prevent pitting. There must be something.

?

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wizard
Posted 2020-02-19 2:05 AM (#594503 - in reply to #594501)
Subject: Re: How to prevent pitting on NOS chromed pot metal??



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Air and moist is the enemy here Dave. Paint the back of the item, at with a good primer to seal and then cover the back side with a good quality rust proof wax. That should be ok as for the back side.

Keep the face of the item as clean as possibly and covered with a good wax. This is even more important if the item is in the front and exposed to chip.

That said, the pitting can also come from "nowhere" if there is air cavities inside the casting.
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Powerflite
Posted 2020-02-19 10:05 AM (#594509 - in reply to #594501)
Subject: Re: How to prevent pitting on NOS chromed pot metal??



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You can paint it with clear too. That prevents it from happening, but it does make it look more dull. Not as shiny as good chrome would look. I am wondering if a good intermediary metal was plated between the zinc and copper if that would prevent most of the galvanic corrosion from happening. I am thinking of something like a Titanium layer, but I don't know how well it would really work.
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57plymouth
Posted 2020-02-19 11:13 AM (#594512 - in reply to #594501)
Subject: Re: How to prevent pitting on NOS chromed pot metal??



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Coat the back with cosmoline or cavity wax. Then coat the front with wax regularly. I doubt you could get clear paint to adhere and remain completely optically clear.
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StillOutThere
Posted 2020-02-19 11:31 AM (#594514 - in reply to #594501)
Subject: Re: How to prevent pitting on NOS chromed pot metal??



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They didn't name Rustoleum "Damp Proof Primer" that for nothing. When living in the Midwest, I painted the back side of bumpers and other parts I had off with the stuff and a quick coat of their aluminum silver. Now in Texas, I just spray and wipe around some Gibbs Brand penetrant on everything chrome back side and front!
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