lowenbrau
SILVER Star
The walnut shells do a good job, I saw a vintage airplane being done with them and it was really nice. There is a local (to me) company who has a truck mounted blaster setup that uses crushed dry ice. It works really well, cools the metal as it goes to reduce warping and evaporates when it has done it's work and only leaves the paint and rust residue to clean up. Brilliant idea, I thought. They do a lot of refinish work in retail stores including food displays in grocery stores.