[R-390] Chassis Cleaning

[ka9egw at britewerkz.com]

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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>
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