Gluing a rubber mat to painted metal?

[C(-)ris]

I've been using one of my rolling tool carts as a work stand more and more lately. I'd like to glue a rubber mat to the top of it to keep stuff from sliding all over the place. It is a lift up lid so at least some of the time gravity will be working against me. Not quite sure what to use to glue the mat down. It probably weights 15lbs. It is a heavy thick floor mat.