I estimate about 3/5 of the body interior has been blasted and primed.
I sanded the outside of the body to check for damage from media blasting. No warping! My methods are gentle enough that I have not damaged the sheet metal. The section below the black line will need a patch panel due to rust damage. Media blasting gets the metal clean but can't remove 100% of the rust. The next step is Rustoleum Rust Reformer which chemically converts the remaining rust to iron oxide. Later I'll spray a layer of epoxy primer as a final sealer.
Media blasting can damage large metal panels. I'm working very carefully using LOW PRESSURE and very fine grit media.
My blasting cabinet now has wheels. I made a rolling cart so I can move it around more easily. Here's a quick video of the cart I made. Dent repair has gone well so far but there are a few tough places that need extra attention. I fabricated a dolly to match the shape of the body line bead that runs the length of the car. The dolly will help me reshape areas where the body bead is dented. Watch the video. Media blasting is a great way to remove rust from metal, but . . . . . . ***Disclaimer*** - DO NOT media blast sheet metal unless you are sure that no damage will occur. Media blasting can cause serious warping and irreparable damage to sheet metal. The methods I use have worked well for me. Media blasting cast iron, vehicle frames and thick steel is usually ok and doesn't have the same risk of damage as sheet metal. These BEFORE and AFTER pictures show how media blasting has removed most of the rust.
A blasting cabinet is useful to clean smaller metal parts. The blasting media falls to the bottom of the cabinet where it is siphoned and used again. Less mess and great results.
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