[Heathkit] Bead Blasting

[Paul Kraemer]

There is a commercial alternative to bead or sand blasting that is less 
destructive
Shop I use has a hot sand bed which has heated sand constantly circulated 
around and through the part to clean it
The stuff given off is burned before being expelled to the environment
After a soak in the hot sand the parts come out clean, they are blown off in 
air and, depending what finish they are to receive may be washed down with a 
rust inhibitor.
It gets about 800 F in there so little aluminum cases aren't left in very 
long.
Just something to consider or know it exists
Paul K0UYA
----- Original Message ----- 
From: "Carl" <km1h at jeremy.mv.com>
To: "John Hensley" <w5jv at hotmail.com>; <heathkit at mailman.qth.net>
Sent: Friday, November 20, 2009 12:01 PM
Subject: Re: [Heathkit] Bead Blasting


>I wouldnt bead blast any thin sheet.aluminum. Crushed walnut shells is a
> milder media that works well and is readily available at low cost.
>
> The chemical strippers rarely get into the perforations completely and 
> leave
> behind a ragged mess. Finish off with lacquer thinner and a small file to
> clean the holes.
>
> Then rinse completely with lacquer thinner, wipe down with a clean rag, 
> keep
> your cotton picking fingers off the metal, spray a thin coat of self 
> etching
> primer, and your top coat of choice.
>
> Carl
> KM1H
>
>
>
> ----- Original Message ----- 
> From: "John Hensley" <w5jv at hotmail.com>
> To: <heathkit at mailman.qth.net>
> Sent: Friday, November 20, 2009 12:13 PM
> Subject: Re: [Heathkit] Bead Blasting
>
>
>>
>> You have to be careful here, particularly with perforated (sp?)metal as
>> the blasting may "peen" the sheet surface causingwaves & distortion. 
>> Good
>> question for the list though.------------------------------
>>
>> Message: 2
>> Date: Fri, 20 Nov 2009 02:22:21 -0500
>> From: "Walt - WB2VSJ" <wb2vsj at earthlink.net>
>> Subject: [Heathkit] Bead Blasting
>> To: <heathkit at mailman.qth.net>
>> Message-ID: <E1NBNp2-0007B4-Ab at elasmtp-junco.atl.sa.earthlink.net>
>> Content-Type: text/plain; charset="us-ascii"
>>
>> Has anyone tried bead blasting a Heath SB series cabinet to remove the 
>> old
>> paint? I have a SB-101, SB-610 and a SB-600 cabinet that have seen better
>> days paint-wise. Rather than sand these by hand I was thinking of getting
>> a
>> small bead blaster gun from Harbor Freight and trying that.
>>
>>
>>
>> Thanks,
>>
>>
>>
>> Walt - WB2VSJ
>>
>>
>>
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