[R-390] Chassis Cleaning

[Curt]

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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