Going to Sears today to buy an air compressor so that I can use air powered cutoff tool. Dremel cut off wheels work fine but they wear out after 3-4" of cutting. At $1.20 per wheel thats getting expensive, also really slow, and there's a lot of rusty trunk to cut out.
Having air is nice, for many things, but it'll take one hell of a compressor to run a cutoff tool. A $15 Harbor Freight cheapie angle grinder and a $10 pack of wheels will probably serve pretty well, as might a sawzall. -- Jim