[R-390] Chassis Cleaning

[Curt]

Oh My!  LOL..

Sand or other abrasive media sure has its place..you named several.  But 
I see NO place you would ever want to use it on a pc of aluminum 
electronics.

I think $68 bucks for the system for soda blasting at Harbor Freight and 
a bag of soda for $20.   Your compressor and you have it made.

Watch the you tube videos on soda blasting and you will see what it can 
do without damage.

FWIW

Curt



On 11/3/2011 1:14 PM, Barry Williams wrote:
> I began by sandblasting redwood and oak signs. This was a new thing at
> the time in the Atlanta area, and a lot of money was in that. I also did
> motorcycle tanks. Like you said, the bondo from shaping chopper tanks
> would be stripped away quickly. There was business in sandblasting
> wrought iron items that had been painted. Some auto work. One guy
> insisted that I sandblast the rear compartment of his Chevy van without
> masking anything at all. After trying to talk sense, the boss told me to
> sandblast away. His vinyl seats were chewed up some, but most damage was
> to the inside of the windows. He paid and never said a thing.
>
>
> Barry
>
>> When I was working part time at a local motorcycle shop, there was a body
>> shop guy we used who used to have a setup to blast with powdered dry
>> ice...took all the paint, rust, bondo etc off slick as a whistle without
>> disturbing the surface of hte metal...
>>
>> 73, Brian KA9EGW
>>
>>> I would NEVER use sand to blast a pc of aluminum...unless you want it to
>>> look sandblasted.  If you want to clean it without impacting the
>>> surface, try soda blasting.   Same type equipment (check Harbor Freight
>>> for inexpensive setup)
>>>
>>> It is essentially baking soda.  washit off with water...will take of
>>> haze and paint without roughing up the aluminum surface.
>>>
>>>
>>> Curt
>>>
>>>
>>>
>>> On 10/31/2011 10:18 AM, kirklandb at sympatico.ca wrote:
>>>> Media blasting (sand, glass etc being the media).
>>>>
>>>> My gun has  ceramic nozzle.
>>>>
>>>> You can get a sand blasting cabinet so that you have a closed system.
>>>> This recovers the media and you can re-use.
>>>> You can also use it outside in which it is much harder to re-use the
>>>> media.
>>>>
>>>> With sand/silicon you don't want to breath the dust. You also have to
>>>> keep in mind the old paints contained LEAD and you
>>>>      don't want to breath that either.
>>>>
>>>> You can check out some of the gear at Princess Auto (Canada) but I
>>>> suspect the US has equivalent stores.
>>>>
>>>>> Date: Mon, 31 Oct 2011 09:46:05 -0500
>>>>> From: ba.williams at charter.net
>>>>> To: r-390 at mailman.qth.net
>>>>> Subject: Re: [R-390] Chassis Cleaning
>>>>>
>>>>> Bob
>>>>>
>>>>> I used to sandblast when I was out of highschool. For metal work, we
>>>>> called it sand texting and I've heard it's called something else now.
>>>>> Same hose pressure but small metal nozzles with finer 'sand.' It will
>>>>> leave a satin like finish pitted into the surface. Think receivers on
>>>>> lever action.
>>>>>
>>>>>
>>>>> the other Barry
>>>>>
>>>>>
>>>>>> I've used several detergents, "mixtures", etc. with some success at
>>>>>> cleaning really grimy chassis. Has anyone tried sand blasting? I know
>>>>>> sand isn't always the medial used, e.g. beads, walnut shells, are
>>>>>> popular.
>>>>>>
>>>>>> What sort of media are best? What kind of gun is used? How much air
>>>>>> pressure? How much media is expended? etc. etc. What precautions
>>>>>> should be made, e.g. (a) for the person and (b) for the chassis, etc.?
>>>>>>
>>>>>> Thanks,
>>>>>>
>>>>>> Bob AG5X
>>>>>> ______________________________________________________________
>>>>>>
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