Aluminum Oxide can be used for your application, but we recommend using Silicon carbide. It has very sharp edges which make it ideal for removing heavy rust, welding and brazing prep, and for glass etching. Our most aggressive media Uniform 60 grit size for even, fast cutting action. Maintains its sharp cutting edges as it breaks down for longer life Use at 80-90 psi max. Be to sure to wear an appropriate respirator. We offer No guarantees since we have not tested this product with your exact application. https://www.eastwood.com/blast-media-silicon-carbide-50-lb.html

Just connect the gun to your 7 cfm at 80 psi compressor put on appropriate protection and put the pickup tube in the included bottle of soda blast media.

For outdoor blasting we recommend Ground Glass either 40/70 mesh or 10/40 mesh. Media size is dependent on the type of blaster and the nozzle size used. Both will remove the rust and corrosion from the frame. I would start with 3 to 4 50lbs bags and go from there. Quantity of media used is also dependent on the type of blaster and nozzle size.

90 Grit Aluminum Oxide will go through any nozzle we offer provided there is enough CFM from the compressor.The larger the nozzle the more CFM will be required.

We use ground glass on a number of our projects. With your VW, be careful not to stay in one spot, as you do not want to warp the panels. https://www.eastwood.com/speed-blast-silica-free-40-70-mesh-50-lbs.html

This 60 grit media would be very aggressive on aluminum. We recommend using our 70-100 grit glass bead media for aluminum.

When using aluminum oxide a simple dust mask will work fine.

This product can be used 2-3 times generally when captured and screened in between uses.