I'm going to kick of my first tiling job on the top of a farily cheap
table. To make an ugly table into something nice for the back porch.

Just a couple of silly questions.

Should I staple plastic down between the table top and the backerboard?

Should I skip the plastic and thin set between the table and the
backerboard?

Should I simply nail or screw the backerboard down? Skip the thinset?

The table is thin, 1/2, maybe a tad less. I wonder If i should top it
with a piece of plywood then backboard? Would also make the table more
rigid.

Any ideas or advice?