On the subject of dry ice. I thoroughly researched it and while it sounds great because it sublimates, and leaves nothing behind, it's more of a cleaning process than stripper. It's not going to get tough undercoating, rust or anything tough like that off. It will remove grease, dirt, and general crud, but you're not going to get near bare metal. In addition, in my local there is a 500 lb. minimum order at $1.50 a lb. and it only lasts a few days. The equipment is also expensive to rent, IF you can find someone near you that has it.
In short, it's not very attractive.
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