20 OZ hopper feed spot blaster

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20 OZ hopper feed spot blaster

Postby ECHOONE » Wed Nov 19, 2008 10:15 am

Going to be doing my second refinish this one on a aluminum frame P6. I don't plan on blasting much at all and on a fixed income.Harbor Freight has this spot blaster for $15.00 has anyone used it to blast finish a pistol? If so how did it come out? If no one has feedback on what you think,think it would work on such small jobs? not sure on a steel gun job but aluminum your only working with 5-10lbs pressure to avoid blasting of anodization right? so should do the job right...
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Re: 20 OZ hopper feed spot blaster

Postby wwb » Wed Nov 19, 2008 2:12 pm

ECHOONE wrote:...... but aluminum your only working with 5-10lbs pressure to avoid blasting of anodization right?......


Depending on the type of anodizing, it runs from less than .001" thick up to about .003" thick for hardcoat anodizing. I would expect aluminum-alloy firearm parts to be quite thin. Grit blasting WILL remove the anodized surface, thereby removing the corrosion protection.

For a quick explanation of different types of anodizing, do a search for "Pioneer Metal Finishing".... before I retired, we had them treat a lot of our aluminum products for corrosion protection, abrasion resistance, lubricity, etc. Their website has (or had, anyhow) some good information. Wikipedia is another good source.

You could, after grit blasting, have the part re-anodized; it is a surprisingly inexpensive process.
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