Timcee - Almost like turning a knob. 
Blasting media is available in a wide range of types from very hard/abrasive stuff to very soft/less abrasive stuff (like corn cob media). If they don't keep walnut shell media on hand they would have to order some. Personally, if you are going to have the interior and exterior of the grill cabinet blasted I would not pay the extra money for walnut shell media as it really doesn't offer any real advantage for surfaces you are just going to repaint.
Blasting media is available in a wide range of types from very hard/abrasive stuff to very soft/less abrasive stuff (like corn cob media). If they don't keep walnut shell media on hand they would have to order some. Personally, if you are going to have the interior and exterior of the grill cabinet blasted I would not pay the extra money for walnut shell media as it really doesn't offer any real advantage for surfaces you are just going to repaint.
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