Polishing and Burnishing eqiupment

I suspect that I am going to be needing some
polishing/finishing/burnishing equipment.

I work in silver - fine and sterling. I have no rings on my list of
designs. My longest piece is 90mm x 36mm. Others are smaller but
none are tiny.

They will be cast parts. They are full of tiny detail and will be
enameled.

I will not be finishing hundreds at a time.

I do not have deep pockets and I need advice to avoid foolish,
expensive mistakes.

I have heard that magnetic pins burnish tiny detail well but the
bowls look small.

Thank you
Justine