This is the first I have heard of the water/sand blasters maybe they would
be ok, particularly for parts where you wouldn't have water getting
captured. However, stripping may be one of those jobs it is best to have
done professionally. In my area there is a firm called Media Blasting that
does auto parts with baking soda. clean the metal beautifully and doesn't
distort or pit the metal. Also, it doesn't cause instant rust like sand.
GJB
-----Original Message-----
From: Fred Katz <fredkatz@2xtreme.net>
To: Steve Sutton <ssutton@ridgecrest.ca.us>; Jim Ferguson <jferg@who.net>;
Shop-Talk Maillist <shop-talk@autox.team.net>
Date: Tuesday, March 24, 1998 3:19 AM
Subject: Re: Water Sand blaster
>
>Hi, I just joined the Shop-Talk list today, first time. I'm wondering if
>this will work on my 1750-psi pressure washer, it does have a siphon-feed
>hose. I'm in the process of restoring a Datsun roadster, and need to clean
>the frame and other parts. I've been holding off getting the frame
>hot-dipped and painted due to the high cost (some friends tell me $600 and
>up, and I've been spending spare money on other more necessary projects).
>If this attachment works, I'll be extremely happy.
>
>Excuse my ignorance, but what types of sand or other media do you recommend
>and where do you buy the stuff? Any danger of damaging body parts? I've
>been told sand-blasting is not good for external body panels, maybe because
>heat is generated and warps the panels. Does the use of water with this
>method do away with that heat problem? Any information appreciated.
>
>Fred Katz
>
>----------
>> From: Steve Sutton <ssutton@ridgecrest.ca.us>
>> To: Jim Ferguson <jferg@who.net>; Shop-Talk Maillist
><shop-talk@Autox.Team.Net>
>> Subject: re: Water Sand blaster
>> Date: Monday, March 23, 1998 10:29 PM
>>
>>
>> I used a similar setup several years ago to *completely* strip the frame
>of my
>> Triumph TR-6. I was VERY , VERY skeptical, but friends swore by it; I
>gave it a
>> try and IT WORKS GREAT!! If you have ever used a large, commercial,
>> pressurized sand-blaster before then you know the routine of having to
>don a
>> large protective hood and breathing mask because of the enormous
>sand/dust
>> cloud that will surround you and the parts you are trying to blast.
>>
>> Using the 'siphon feed' sand blasting attachment on a high pressure
>washer
>> (mine was 3500 psi I believe) you have just about zero dust (due to the
>water),
>> no sand residue all over the place, just a small confined area of wet
>sand.
>> And boy does it strip off paint in a hurry. I even used *sightly* less
>sand
>> than I would have if I used a air only sand blaster.
>>
>> The only issue to be aware of, is a increase in the possibility of 'flash
>> rust', depending on the temp and humidity. I did not have the problem
>with the
>> frame, but with some smaller parts that I did a few weeks later, when it
>was
>> fairly cool outside. How to deal with it? Since I was going to paint
>these
>> parts, I simply used a normal phosphate coating to neutralize the flash
>rust.
>> These phosphate coatings (from PPG, Dupont and others) are simply a
>solution
>> that you mix with water - something like 8oz to a gallon of water and you
>apply
>> it with a sponge or dip the part in it; let it sit and then wash off.
>>
>> These parts have been painted 3 years now with no problems.
>>
>> I will not go back to air-only sand blasting!!
>>
>> -Steve Sutton
>>
>>
>>
>> > From: Jim Ferguson <jferg@who.net>, on 3/23/98 11:16 PM:
>> >
>> > I was in Wall Mart the today and saw a Pressure Washer attachment for
>> > Sand Blasting. It has a suction type pick up for the sand and uses the
>> > high pressure water as propulsion for the blast media. In spite of
>> > Andy's remarks I bought it, specifically because it was marked down
>from
>> > $29.95 to $ 5.95. I don't think I have a use for it but I'll bet I
>can
>> > find one. It is a neat thing to have; I think!
>> >
>> > I have a 2500psi washer. I think it will do a real job on some very
>old
>> > and rusted lawn furniture that my Wife has been bugging me to paint.
>I
>> > know I will have to dry it quickly to prevent flash rust.
>> >
>> > Who cares, I got a new tool! Anybody ever used one??
>> >
>> > -------------------
>> > Jim Ferguson
>> >
>> >
>> >
>
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