Cutting out the rust, cuttoff tool? Options

[swl]

I bought myself a compressor and el cheap tool kit. I was kind of hoping that the cutoff tool would be the right thing for cutting out the cancer. Had a go at it today but this tool was useless. No torque at all - stalled with very little pressure - hardly any sparks. There is an adjuster on it that seems to throttle the air supply. Played with that a bit but it didn't really make any difference.

So do I have a faulty tool or just the wrong tool for the job?

[swl]

Thanks everyone. Lots of good info there. The cutoff tool has been banished to the basement.

Dremel worked just fine. Not super fast but good enough - I had to be carefull to keep the rpm up and let the wheel do it's work.

I do have an electric grinder but I didn't know you could get cut off wheels for grinders (where is the blushing newbie smilie?). Working down there though I don't think I'd want to be slinging around the big grinder - god only knows how much damage I could do!

Thanks all.