Sand or media

Author Topic: Sand or media  (Read 3154 times)

Offline HEMI HUNTER

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Sand or media
« on: January 20, 2005 - 05:45:51 PM »
decided I have enough cars to justify my own blaster.   Do I buy a sand blaster and use media stuff in it ?

diffrent tips?   hurry I gotta get one in AM.   What substance do I use, my paint pal uses glass beads on
the race car, he dosen't want me to make pits or waves?
Why are the only other cars on the road all in my rear view mirror?  Oh yeah cause I got a 440/6 pack

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Offline hemi71

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Re: Sand or media
« Reply #1 on: January 20, 2005 - 06:14:11 PM »
I use glass beads in my blast cabinet, they do a nice job, but take some time as they are not very aggressive. I understand that getting silica sand is almost impossible for blasting use anymore, as Silicosis is a concern. TThere is a blast media based on coal that some people have used and said it works geat, but I don't have any personal experience with it. I think it's called "Black Magic"

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Offline budrinker

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Re: Sand or media
« Reply #2 on: January 20, 2005 - 06:23:55 PM »
i hear walnut shell

Offline torredcuda

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Re: Sand or media
« Reply #3 on: January 20, 2005 - 06:31:58 PM »
Are you talking portable pressure blaster or cabinet?Black beauty is coal slag,is very aggresive and is used for removing heavy rust.I do not reccomend it for stripping large areas as it will warp the panel if you are not extremely carefull and will also leave saml pits.Glass bead is good for fine work and leaves a nice smooth finish and is what most people use in a blast cabinet.Plastic media or wlanut shell is what most is usaully used for stripping a complete body shell,it will remove paint but not metal or rust.
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biglove

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Re: Sand or media
« Reply #4 on: January 20, 2005 - 06:34:42 PM »
www.eastwood.com sell all types of media walnut shells

Offline miketyler

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Re: Sand or media
« Reply #5 on: January 20, 2005 - 06:44:56 PM »
fine glass bead here - great for thin aluminum, will relieve material surface stress as well
« Last Edit: January 21, 2005 - 09:36:45 AM by miketyler »
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Offline 1973challenger360

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Re: Sand or media
« Reply #6 on: January 20, 2005 - 07:07:04 PM »
how many cfms is your compressor ?
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Offline OUTLAW

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Re: Sand or media
« Reply #7 on: January 20, 2005 - 07:12:12 PM »
Black Magic= slag= use on frames and heavy metals
silica sand= sand box sand at hardware stores=  use on frames and heavy metals
glass bead = use on cast iron and aluminum heads -manfolds etc
Plastic bead=use with care on panels and fiberglass*
Walnut hull= use to decarbonize heads, valves etc -can be used with good sucess on panels but is a slow process

* personal preference

Offline moparnut

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Re: Sand or media
« Reply #8 on: January 20, 2005 - 08:01:14 PM »
Save your money on the blast cabinet if you are going to use anything other than glass beads,which doesnwork well with Rust.I bought a new freestanding cabinet on sale for 200 bucks a few weeks ago and its worthless with sand,it gets so cloudy inside you cant see what you are sandblasting,even with a shopvac hooked up to it.
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beamtallica

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Re: Sand or media
« Reply #9 on: January 20, 2005 - 09:31:50 PM »
I plan on striping all the B5 blue paint of my 71 cuda when I get it... Oh wait, I CAN'T  :spank:

Offline 4Cruizn

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Re: Sand or media
« Reply #10 on: January 20, 2005 - 09:46:11 PM »
What Type of Media Should You Use??

Aluminum Oxide: Widely used as a cutting media.  It can produce an "anchor" pattern in preparation for recoating. It is excellent fro removing heavy foreign matter, deburring, frosting glass, plastic, and lettering stone.  It is extremely fast cutting, can be used many times and is classified in various sizes for a wide selection of finishes.

Glass Beads: Available in a wide range of sizes. Glass beads are the most popular media used in cabinets today.  This all-purpose media is used for honing, polishing, peening, blending, finishing, removing light burrs, and cleaning most light foreign matter such as carbon and other surface residues from pistons, valves, etc.  All with no base-metal removal or dimensional change.  Weld and solder flaws can also be detected via glass blasting.

Walnut Shells: This soft aggregate is used in blasting processes for removal of foreign matter or coatings from surfaces without etching, scratching, or marring the cleaned areas.  Examples of applications include cleaning of delicate molds, armatures, and electric motors prior to rewinding.  Will not harm internal engine parts and is bio-degradable.

Plastic: This relatively new, dust free media is a special formulation of plastic material that has a high tensile, compressive and flexural strength, combined with comparatively low hardness.  used for deflashing plastic parts and cleaning molds, dies, electronic connections, and circuit boards.  it can effectively deburr machined-iron castings and non-ferrous screw parts.

Steel Shot/Grit: Steel Shot is a solid, round particle causing a peening action and producing a dimpled surface.  Its heavy weight gives greater impact and hammering action for peening and cleaning heavy forgings and removing heat treat scale.  Steel Grit is angular, and acts like thousands of tiny chisels and cutting tools, and does a fast cleaning job.  produces an ideal surface for adherence of new coatings. 

Custom Mixes: often medias are mixed and combined with each other to achieve different effects and finishes.  The combinations are almost limitless. Let Ace Stripping, Inc. experts create a custom mix to perfectly suit your needs.   :grinyes:   :grinno:   :grinyes:   :grinno:

Offline HemiDog

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Re: Sand or media
« Reply #11 on: January 20, 2005 - 10:11:21 PM »
If you are planning on doing the entire car, you are going to need a huge compressor and a lot of media.  As you reuse the media, it gets finer and finer.  It will eventually creates a lot of dust and lose its effectiveness.  I had my car done by a shop that specializes in media blasting, but I did pick up a cheap cabinet to do small parts myself.  For that I have been using glass beads for parts with light rust and sheet metal.  I use aluminum oxide for the more rusted steal parts.

I have found that before painting blasted parts, it helps to sand the surface a little.  It seems that the surface is a little on the slick side for primer and/or paint.

Offline MoparMan

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Re: Sand or media
« Reply #12 on: January 20, 2005 - 10:19:20 PM »
  I've been doing my own sandblasting for many years. I have pressure blasters that I blast large parts with outdoors. I bought a blast cabinet from TIP Tools, before I started the restoration of the "Banana Challenger" a few years ago (see old posts from 2002-2003). I bought it with a vacuum. It's been worth every penny. Could not have done the resto without it. It saved so much time cleaning up parts. The proper vacuum will keep the view clear in the cabinet.
I use #1 grade sand which I can buy at a local hardware store. DO NOT use play sand unless you pour it through a screen first. You won't believe the trash you will find in that stuff. Also, play sand (gold/yellow color) will create more dust in the cabinet than the white "blasting" sand.
I do not blast sheet metal due to the easy warpage. I leave sheet metal work to professional body guys.

Just a few tips..
MoparMan
(Bob)
 




Offline Chryco Psycho

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Re: Sand or media
« Reply #13 on: January 21, 2005 - 02:05:34 AM »
Plastic

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Offline ChallengerVert

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Re: Sand or media
« Reply #14 on: January 21, 2005 - 02:13:15 AM »
Make sure you have a good compressor!  I learned the hard way.
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