I just bought a small abrasive cabinet to blast some small parts on my car. What i did was go to the beach and filled a 5 gallon pail with sand. I use that to blast a steel turbo exhaust housing that was rust color. It took the rust color off of it but it did not give it that silver finish. It kinda looked yellow like the sand. I tried washing it but that did not work either. I then used this very white fine sand from the sandbox in the backyard. It was finer and dryer than the beach sand. When i did it with this it made the piece look silver, the finish i wanted. So my question is this. What made the difference in color? Was it the grit size, color of the sand, or the fact that it was perfectly dry and the the beach sand was damp that affected the color? Should i be using a differnet type of media? Like i said a little off topic but maybe someone can help me out?

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