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 Post subject: Hallicrafters PM-23 Speaker
PostPosted: May Sat 05, 2012 5:01 pm 
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Joined: Jan Fri 13, 2012 4:12 am
Posts: 85
I just picked one of these up at a flea market.

The metal front grill has a lot of rust. Can anyone offer
a good method of removing the rust without damaging the metal.
I would like to clean this speaker up. It sounds good.
I just stated painting it and so far so good. Just need to know
how to attack the front metal grill

thanks
Ken
N1KK


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 Post subject: Re: Hallicrafters PM-23 Speaker
PostPosted: May Sat 05, 2012 5:36 pm 
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Joined: Mar Tue 30, 2010 2:24 am
Posts: 7690
Location: Lehighton, PA.
You're gonna love this, toilet bowl cleaner! :D

http://www.thecj2apage.com/forums/cleaning-rusty-toolsmight-work-on-jeep-parts-2_topic22106.html?KW=toilet

http://www.thecj2apage.com/forums/rust-removal_topic23242.html?KW=toilet

http://www.theworkscleans.com/toiletcleaner.html

The one on the left is toilet bowl cleaner, in the middle is rust remover, and on the right is vinegar.
Image

Larry

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 Post subject: Re: Hallicrafters PM-23 Speaker
PostPosted: May Sat 05, 2012 8:01 pm 
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Joined: Jan Fri 13, 2012 4:12 am
Posts: 85
That is funny, and I do love it.

Need to read a bit about it. Can I just soak the pieces in a plastic container of
this stuff or do I add water to it? Might pick up some tonight.

Ken
N1KK


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 Post subject: Re: Hallicrafters PM-23 Speaker
PostPosted: May Sun 06, 2012 12:27 am 
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Joined: Dec Thu 10, 2009 2:59 am
Posts: 314
Location: Shiloh, Illinois, USA
Molasses only attack the rust not the metal, it's cheap 17$ for 2.5 gals makes 25 gallons, disposal is not a problem. only down side when cold it is slow working. tt

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 Post subject: Re: Hallicrafters PM-23 Speaker
PostPosted: May Sun 06, 2012 2:29 pm 
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Joined: Jan Fri 13, 2012 4:12 am
Posts: 85
Lowes didn't have it. Will have to try Home Depot or one of the super markets.
So far the paint job is coming out pretty good. I am using the Preval kit with a good
match picked out at Lowes

Ken


N1KK wrote:
That is funny, and I do love it.

Need to read a bit about it. Can I just soak the pieces in a plastic container of
this stuff or do I add water to it? Might pick up some tonight.

Ken
N1KK


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 Post subject: Re: Hallicrafters PM-23 Speaker
PostPosted: May Sun 06, 2012 4:56 pm 
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Joined: Mar Tue 30, 2010 2:24 am
Posts: 7690
Location: Lehighton, PA.
Walmart carries it.

Larry

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 Post subject: Re: Hallicrafters PM-23 Speaker
PostPosted: May Sun 06, 2012 5:35 pm 
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Joined: Oct Sun 18, 2009 5:38 am
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Location: Tyler, Texas 75707-4212
Likely active ingredient is phosphoric acid. Can be had at Lowe's as Jasco Prep and Prime. Works great to remove rust, provide a thin conversion coating and ready to paint over after a rinse.

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 Post subject: Re: Hallicrafters PM-23 Speaker
PostPosted: May Sun 06, 2012 11:31 pm 
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Location: Lehighton, PA.
Don't make any assumptions when dealling with any rust remover. Before you use any of this stuff, click on the links above and read the threads. The Works is not for soft metals like aluminum or brass, for instance. Using the wrong stuff in the wrong application can cause very real damage.

Larry

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 Post subject: Re: Hallicrafters PM-23 Speaker
PostPosted: May Mon 07, 2012 6:55 pm 
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Joined: Jan Fri 13, 2012 4:12 am
Posts: 85
rocketeer wrote:
Don't make any assumptions when dealling with any rust remover. Before you use any of this stuff, click on the links above and read the threads. The Works is not for soft metals like aluminum or brass, for instance. Using the wrong stuff in the wrong application can cause very real damage.

Larry


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 Post subject: Re: Hallicrafters PM-23 Speaker
PostPosted: May Tue 08, 2012 6:36 pm 
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Joined: Jan Fri 13, 2012 4:12 am
Posts: 85
The piece on the right is after 20 mins sitting in the works. It looked rusty
like the piece on the left. I used a scotch brite pad on the top of the grill
on the right and it cleaned it up nicely.

I have not figured out how I will clean in between each grill section yet.
I am not sure if it is dirt I was taking off the grill with the scotch brite pad
of any kind of finish that might have been there. However I do get a shine
after cleaning it.

They where both equal with rust.

Ken
N1KK


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 Post subject: Re: Hallicrafters PM-23 Speaker
PostPosted: Jan Tue 10, 2017 7:34 pm 
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Joined: Jul Tue 21, 2009 1:38 pm
Posts: 673
Location: SW WA state
MSDS on The Works shows it is 9.5% Hydrochloric Acid.


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 Post subject: Re: Hallicrafters PM-23 Speaker
PostPosted: Jan Tue 10, 2017 10:24 pm 
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Joined: Sep Wed 10, 2014 2:01 am
Posts: 1359
Location: Costa Mesa, California
If the metal was coated with cadmium, do not sand or create dust. Cadmium is poisonous and does bad things in the human body. Use a respirator or at least a dust mask is you are sanding cadmium coated metal (most radio chassis). If you are exposed take some chelated zinc pills. They will also prevent colds.

Norm

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 Post subject: Re: Hallicrafters PM-23 Speaker
PostPosted: Jan Wed 11, 2017 3:11 pm 
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Joined: Jun Sun 06, 2010 2:00 pm
Posts: 24
Location: Watkinsville, Georgia
This is great to know! The Works is the best toilet bowl cleaner I've used and always have it around. This is the opinion of a pro having been Latrine Queen of my platoon at Fort Monmouth (RIP).

Harry, KT4AE


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