Why are you having to paint the steps and botom again?

Long story, very very slick, negected to use skid-tex on steps. Has caused several falls and it needs another coat, doesn't look "great". Such a big job want to do it right...do I just need to rough up the surface and put on another coat? What about curing?

With most epoxy type paints after the paint has cured more than a couple of days then you need to sand the paint so that the next coat will adhear.

So the paint you are useing does not address this on their data sheet.