Best media for blasting?

Tried the number for New Age but it's no longer in service.
So first what size material do you use and then I'll try to find something close. I have a local source for Green Diamond 100lb/8.79 but it's 16/36 size grit which I suspect is for Bridge work not sheet metal. The guy doubted it would fit through my gravity feed unit. NAPA has some walnut shells but they have no idea what size they are and are out of glass beads. So being an hour from the next likely town to carry these supplies I'm wondering what my best option is.
Will Walnuts take off the nasty old asphalt residue up inside the fenders or would glass or sand be preferred?
What size grit works best for sheet metal projects?
I see the HD play sand is still an option but I'm not convinced it's an advisable one...
Any help or suggestions are much appreciated, Thanks.
 
Thanks Shine that's about what I thought. I have found a local company that uses media for their manufacturing and he'll sell me some 30/60 out of their 1K bag. He also has walnut shell but we think to remove the road tar residue thats left in these fenders I best go with sand, and that was Barry's thought as well when I asked him. Too bad beach sand doesn't play well with metal... I've got miles of it just a stones throw from here.
 
Shine, what mesh size crushed glass would you recommend for paint/light rust removal to prep for epoxy primer?
 
I have not but i have bought a couple things in the past from that company. They were really fast to ship everything. I had no problems with them. Glad you posted though because i was looking for al-ox for my cabinet. Not sure if its worth it once its shipped. Ill have to look into it and call my local blasting supplier to compare. He is an hour drive away though so i prefer shipping if its not too crazy
 
I've used this for years...they told me it is 80-100 grit. Cost has been around $10-$12 for a 100lb bag.http://www.kellermaterial.com/sand/sugar_sand.html#thumb

I did luck out one time and got 8000lbs of Dupont Starblast for $500, it was leftovers of a blasting job at the University of Texas....this stuff works really well too. I just wish it wasn't so hard to find around here.
 
shine;41206 said:
mesh size depends on your equipment . the larger the nozzle the larger the mesh size .
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I'm using a pressure pot that holds 100 pounds, nozzle size I don't remember, been awhile since last used.
 
anotheridiot;41215 said:
Glass wont remove rust.
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Oh really? This piece came out pretty decent just one time through.
Grill-upperfillpanelrust1.jpg


Needs just a little touch up.
Grill-upperfillpanelblasted.jpg
 
Jim C;41212 said:
I have not but i have bought a couple things in the past from that company. They were really fast to ship everything. I had no problems with them. Glad you posted though because i was looking for al-ox for my cabinet. Not sure if its worth it once its shipped. Ill have to look into it and call my local blasting supplier to compare. He is an hour drive away though so i prefer shipping if its not too crazy
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Anything over $50 is free shipping. I need to see if they carry just Aluminum Oxide. Fastenal has it but quite pricey.
 
We use extra fine crushed glass for paint and rust removal. Works perfectly fine. Is it the best? Depends on the application. If it is a really rusty frame, then no, crushed glass would be inefficient. Atleast the extra fine anyway. But on car body panels? Yes it very efficient at paint removal and rust removal without warpage (even though you can still warp with even soda...all about the user) or metal deterioration.

Works very good in a blast cabinet also. Leaves a smooth enough finish for painting but coarse enough of an anchor pattern. It is usually how I prep all my painted bolts and stuff. Straight to epoxy then basecoat/clearcoat and doesn't leave that grainy "blasted" texture under it.
 
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