I live in a mobile home they have a edging on top of the cabinets.I want to replace it
Virginia you can take your molding or a photo of it to the hardware store. Measure how much you need. Usually theyanttatch with finishing nails but they can tell you that too. Or maybe they were glued in place.
Make sure to match up the paint or choose your color.
Do you mean crown molding or the wall that hangs over the cabinets ?
I have seen the railings and other patterns for tops of cabinets at Home Depot. You would need to remove what is there and replace with another pattern or wood