The next thing to consider is, where are you going to sandblast the car? Remember this is a total-loss system, so unless you want to create a sandy beachfront on your property you'll have to devise a way to recycle the media. The best way to gather expended media is to park on top of a large plastic tarp, and then roll it up. Eastwood sells a media sieve that worked well for filtering out unwanted ingredients. I would have liked to utilize my driveway for blasting, but the code enforcement spy wouldn't have liked that. I had the Buick masked off in the driveway, but fear of getting caught had me cutting away some of the Visqueen, and driving the Buick semi-blind into my entryway courtyard. I made kind of a bad mistake by lowering the driver side window, and not making absolutely sure there wasn't any aluminum oxide present in the channel. (Loyal SR readers might look forward to an upcoming article on how to use Eastwood's glass polishing kit to remove scratches from side windows and windshields.) This brings us to discussing unlike conventional abrasives, soda blasting is safe to use on glass, chrome, or rubber. The larger the soda crystal the more aggressive the soda media will be. In addition to basic soda, Eastwood offers Flow Formula soda with waterproof crystals that are immune to humidity.
The heart and soul of sandblasting is air supply and air quality. Perhaps the most voracious of all pneumatic endeavors, sandblasting requires a vast reserve of moisture-free compressed air. The harder an air-compressor has to work to keep up, the hotter it will get. Heat produces water in the receiver (air tank) that exits into the sandblaster if not trapped (filtered) first. Moisture in the media creates lumps that will plug the blaster. Eastwood specifies the Master-Blaster dual-blaster's air supply should be a minimum of 10 cfm at 80-90 psi. The Master-Blaster comes with three sizes of nozzle. For minimum cfm-rated compressors use the smallest size nozzle for best results.
The alternative to relying solely on sandblasting is a hybrid method. To strip paint and remove rust down to bare metal use one of Eastwood's cleaning/stripping disc systems first. Afterward, the Master-Blaster can be utilized to access the unreachable areas, and dig deeper into heavily pitted areas. A quick blast across the entire area with the Master-Blaster will leave the perfect surface for applying an etching primer. Don't allow the bare metal to remain unprotected; stop reading this and go shoot some primer.