None of the medias work very quickly on the underfloor deadeners. Often the blasters will tell you their not keen on taking on the floor when it has deadener laid on thick.

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SooperDooperMiniCooperExpertEngineering

All garage work involves equal measures of enthusiasm, ingenuity and a fair degree of irresponsibility.

Sorry forget ...ive never reused the soda once its on the floor , as it explodes as it hits the job and renders it useless ...but I have heard of people sweeping it up and picking out the big bits and using a sive to get the smaller bits out and re using it a total of 3 times , but once u see it on the floor with all the bits of paint,rust, grinder dust etc you will look at it and say crap forget it , and sweep it up and throw in the bin lol

My shell was sandblasted. because it was on a rotisserie I was able to tip it upside down. there was a good deal of sand came out. even after good cleaning.

I would recommend having any car sand blasted by a professional if you are doing a full bare metal resto.
After my car was done it exposed many rust areas that were hidden and would have only caused grief in the future.
The panel beater loved it as it gave him clean metal to work with ultimately saving me money.
Whole car, doors, boot, bonnet etc $800 and undercoated

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------------1967 Mini Cooper S--------------
The quality will be long remembered well and truely after the price is forgotten.

They're not keen on powdercoat either, take that into consideration when your coating parts and make sure you're completely happy before it's done.