I want to use the tumbler to polish carbon steel panels of 3 x x 3/36 inch, using steel grits. Can the tumbler to function for such a purpose?

We'd need more information about the steel grit. here are the dimensions: Rubber liner: 6.75 Inches Inside width, 8.25 Inches Inside depth, Gasket: 9 Inches wide. We'd need more information, but it should work.