rangerj:
Do you literally "Sandblast" aluminum? With silica sand? Silica sand has been banned as a blasting medium in every State I know of, because it is known to be a cause of cancer. It may even be prohibited by federal law (OSHA) if you have employees doing it.
Soft metals, like aluminum, should generally be blasted with glass bead or walnut shells. These do not chew up the metal, like a crushed rock medium such as "Black Beauty".
I suggested a few ways to remove the oxidation with inexpensive hand tools, because I did not think most of the "do-it-yourselfers" on the forum have "sand" blasting equiptment.
You are right about it being a tough job when doing it by hand, but if they spend a day or two giving their SHO some "spit and polish", they are happy. They can even go all the way and clean up the casting seams with files and grinding stones, before they polish it to a mirror finish, and clear coat it.
It will be work, and it will be time consuming, but then they are not looking to complete 50 pieces a day! If they are in a hurry, or do not want to spend the time doing it themselves, then they can send it out to a professional metal polishing operation.
The original question was, "how can I remove the oxidation from the aluminum throtle body" (paraphrased). It, (the question) was NOT, who or where can I send it, to have someone else do the work!
It's great that you responded to the inquiry, because those who are not interested in doing this type of work themselves, now know you are out there. rangerj
