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Old 09-28-2003, 10:06 PM
akm akm is offline
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sand blasting

i was reading another thread on silica sand and i don't know a damn thing about sand blasting but i have been using regular medium grade sand, kinda like play sand, and it seems to work fine after put though a screen.
is there anything wrong with that?
thanks Aaron

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Old 09-28-2003, 10:21 PM's Avatar
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White silica sand is "sharper" it cuts cleaner than play sand. When I lived in Northern Michigan I used beach sand for utility blasting, it works but silica is better, requires less sand and pressure to do the job. Just don't try it on body panels, a friend of mine did on a black 70 Camaro back in the mid seventies, talk about wavy panels!!!
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Old 09-29-2003, 12:03 AM
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I was just at the sand store a few weeks ago. The guy sold me some "illegal sand" #60 size. It's illegal cause it's not approved for sand blasting by OSHA, hence it has to be good. I always bought the kiln dried #30 in the past but with the under the table #60 it cuts faster and tighter in this reporters opinion (and the guy who said try the#60)
I don't know about warping panels with it, I'll have to try sometime.
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Old 09-29-2003, 04:23 AM
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You can sandblast any panel as long as you know what you are doing. Older cars do not warp like the newer cars because of the thickness but you can sandblast newer panels. Most people that says you can't have never done it or if they did, it was done incorrectly. You CANNOT blast the panel direct. You have to go across almost horizontally to reduce the friction that creates heat. You hit the spot head on and I guarantee you will warp it. It takes time but can be done. Also the higher the pressure you are using the more chance you have of warpage. Go across the panel, not head on, move around and do not stay in one spot, and alternate between one panel and another and you should be fine. Try keeping a greater distance between the panel and the blaster to. It uses more sand but reduces the risk of warpage.

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Old 09-29-2003, 07:42 PM
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I have sandblasted numerous panels. I have never had any problems with warpage from that. I must be doing something wrong. I always consider blasting the same as painting. It is better to do a little at a time. If you try to go thru the paint at once, you will likely overheat things.
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Old 09-30-2003, 01:11 PM
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I've said this in posts regarding silica sand before, but it is worth repeating. Silica sand is the BEST in my opinion for sandblasting- yes it is 'sharper' and cuts better, yes, it can be used on flat panels if you lower pressure and like Kev says angle the nozzle- BUT- be careful!!! Silica sand contains silica which if inhaled causes silicosis and when you can't breathe you die!!! I know I'm sounding like 'Dear Ole Dad' but if you protect yourself you get that many more years of Car Fun!!! The reason I say this is an acquaintance died because of this- inhaling silica sand dust, dust from the hay and strawfeild and smoking. Quitting any one or protecting himself could have caused him to be here longer...
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