I have a 69 Camaro that needs to be blasted inside and out to remove old paint and RUST. I’m learning about sandblasting and I understand for body panels you do not use “sand” but rather less abrasive media. Here is the problem. I have no idea which to use. I want to use something that will not warp my body panels but yet strong enough to remove any rust. Ultimately, I’m looking to end up with a clean, rust free body shell before I begin any body work/welding.