I agree that the scroll saw blades are a bit course so that's when I'd reccomend putting a metal cutting blade in there.
(FINE TOOTH) If there is a SPEED CONTROL on the unit, so much the better.

On the other hand - you are 100% correct -- get a proper tool --- what I was referring to, was the fact that the gentleman inferred that he only had a scroll saw. Take advantage of what you have -- if that's all you have.

marwen1