Painting the floor - what to use?

[62lwbc10]

Dear all as some of you know I took out my bench seat and gas tank and have been repairing some small issues in the floor, welding etc. I am planning to paint the floor in a few days and wondering what to use. Was originally going to go with a satin type underhood black paint but I need something that has better hiding properties. A friend strongly recommended a roll on bedliner paint that would also provide better sound deadening properties . I wonder if the bedliner would be too thick. I was also considering using a rattle can hammertone black paint that would fill in some if the pitting and provide a better seal than the underhood black. Anyway, what do you guys think?