Tips on taping and painting inset area of tailgate

[cruizin01]

When we painted my truck years ago we hung it upside down and didn't get enough clear on the angled area and when we buffed it we went through the clear.

So instead of respraying the whole gate Im thinking about spraying the insert area satin black to match the bumper.

The bumper I sprayed with a single stage chassis epoxy. Is it possible to tape and paint the gate with the same stuff? Im concerned about a tape line. Is it possible for it to be smooth? Or would I have to clear the whole thing?

Thanks in advance.