[6pack] Sandblasting rust.

[James_]

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