I am planning to cut out rounded shapes from 3 mm thick brass plates and am looking for advise regarding tools. I've seen videos where people use jewelers saws/fretsaws to cut brass sheets, but these are only between 0,5 - 1,5 mm thick so I was wondering if a jewelers saw would be sufficient, or perhaps it would but not very practical or efficient. And if it is the right tool for the job, what type of blades would you recommend?

I do also have a Dremel with metal cutting discs, but these are obviously not well suited for rounded shapes. I could make many small, straight cuts and then file it down to the final shape, but this seems quite cumbersome. And since brass is pretty soft I worry those discs would get clogged up pretty fast and I would have to go through a whole bunch of them before it's done.

So, what would you use for a job like this?