Don't get the Harbor Freight one - they don't sell replacement nozzles. I
got an inexpensive one at Sears, and they do have extra nozzles.
For areas that aren't visible body parts, you really don't have to worry
about heat. I usually run at about 80PSI and that works well with rust.
Sandblasting with regular sand is generally a bad idea because of the free
silica. According to what I have read, even using a P100 rated mask isn't
good enough. Harbor Freight sells aluminum oxide blast media, which costs
way more than sand, but doesn't have the free silica issue. Worth the $40
in my opinion. By the way, this media eats standard nozzles, as quickly as
in 30 minutes of blasting. So get the extra nozzles when you buy the
blaster.
Make sure you cover up everything you can because the media gets
everywhere. And try to prime as soon as you're done blasting, or you'll
get more rust pretty quickly and you can do it all over again.
Tom
On Tue, Feb 10, 2015 at 4:19 PM, James_ <jattr6@hotmail.com> wrote:
> Tired of all my questions yet?
> I have some rust on the firewall in the engine compartment on either side
> of
> the transmission. Getting a grinder down there will be a pain. I'm
> thinking of
> low pressure sand blasting. I read soda blasting isn't strong enough for
> rust.
> I also have the area where the PDWA brake device is mounted.
> Harbor Freight sells a small unit.
> Anyone want to chime in. Experience. Advice?
> I read to be careful over heating. So I think lower compression is best.
> But I
> am new at this.
>
> Thanks
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