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Kevin in NJ · 08-29-2013, 07:24 AM

The Sparks you see are energy released as the quartz breaks and releases energy. I too have seen these sparks in the daylight.

This is not total heat energy being put into the metal. If that was so then you would NOT be able to touch the panel after you blasted it and the metal will change color. Keep in mind that heat shrinkage starts when the metal starts the blue color. You must get the whole metal into the plastic zone.

Think about the sparks you get when you press the igniter on the grill. That spark is generated by deforming quartz.

I can assure you that it does not take 8 hours to blast a fender at 40 PSI with the right equipment. It takes a day to do a full car and it is not as fast as one might like.

But hey, what could I know anyway.

08-29-2013, 07:24 AM	#12
Kevin in NJ Senior Member Join Date: May 2010 Location: South East NJ Posts: 3,398	Re: Body sandblasting The Sparks you see are energy released as the quartz breaks and releases energy. I too have seen these sparks in the daylight. This is not total heat energy being put into the metal. If that was so then you would NOT be able to touch the panel after you blasted it and the metal will change color. Keep in mind that heat shrinkage starts when the metal starts the blue color. You must get the whole metal into the plastic zone. Think about the sparks you get when you press the igniter on the grill. That spark is generated by deforming quartz. I can assure you that it does not take 8 hours to blast a fender at 40 PSI with the right equipment. It takes a day to do a full car and it is not as fast as one might like. But hey, what could I know anyway.