I blasted a car part mold today using soda but it was too aggressive and took off some of the design. Is there anything out there more gentle than soda? The company is measuring this to a very fine degree.
The company wanted me to use 90 psi to see what it would do over time . I told them that we should use lower pressure to the point were it would remove the coating. What hapened is it has low and high grain in the mold and it would dull the high grains.The low grains are dull and the high grains need to stay shinny.The mold is aluminum and is used for dashboards.They will not let me use water.They asked about talc I have never used it. Do you think it would keep the shine?Were would I buy talc?