Question on vintage mold

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Last Post 28 December 2020
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sluggo posted this 26 December 2020

Hello: What is the best way to get a vintage mold ready for casting? I picked up a vintage 45-60 mold that has surface rust and some light pitting on the mold surfaces. Any help is appreciated. Thanks in advance. I cannot figure out how to upload photos of the mold. There does not seem to be an option for doing so.

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OU812 posted this 26 December 2020

Scrub mould with toothbrush, baking soda and water.

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Squid Boy posted this 26 December 2020

If that doesn't work try Bar Keepers Friend (sort of like Comet but better) and a toothbrush. I learned that trick here. Good luck, Squid Boy

"Squid Pro Quo"

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JimmyDee posted this 27 December 2020

...or Bon Ami if soap and water and a stiff toothbrush don't suffice. Avoid Comet and Ajax.

I've read of a technique that involves removing the sprue plate, making a cast with alloy poured through a nut, dressing the cast with Flex or fine lapping compound, and turning the cast with a wrench to clean up the cavity.

Pits in a cavity may or may not be a problem.

We're all curious to know how it turns out...

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Boschloper posted this 27 December 2020

I use "Soft Scrub" on cast iron molds. It is another mild abrasive similar to Bar Keepers Friend or Bon Ami. Borrow someone else's toothbrush.

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Ken Campbell Iowa posted this 27 December 2020

... don't worry at all about a few pits in the cavity ... and yes, BonAmi is so mild you can polish glass with it ... such as your car's windshield ...

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sluggo posted this 27 December 2020

As usual i knew this was the place to get sage advice. I have some bon ami in stock. I will put it to use. Good idea on someone else's toothbrush! Still cannot load any photos of the mold. Thanks again everyone and happy holidays.

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RicinYakima posted this 27 December 2020

Sluggo,

type your message. On the bar over the text, about left of the middle is a square that looks like a picture. Left click on it and in a second a box will show, Push bourse. Go to your picture file and

and push open. The picture will appear.

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sluggo posted this 27 December 2020

Thanks: finally figured it out. My cell phone does not have the bar option you told me about. My laptop does. I must have a bargain, low budget phone! Thanks again. here's the mold.