Sandblasting
I have used something similar in the past, but found the dust & contamination to be a real problem. If you intend to do only smaller parts, a sandblasting cabinet can be purchased for around $300 from several companies. I bought mine from Radum in Brisbane. They also have office in Melbourne etc...
I know a cabinet cost is considerable, but the benefits are also significant. For example, all sand is reusable, dust is entirely contained & any shop vac can be used as extraction. Also, and this is an important one for me, you can blast while you sit down & peer through the glass, so you don't need PPE and don't make a mess of everything around the workspace.
With the cost of sand etc, a cabinet pays for itself soon enough.
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Ford CMP, 115" WB,1942 (Under Restoration...still)
Medium sized, half fake, artillery piece project. (The 1/4 Pounder)
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