Smoother top surface

This print is in the high quality settings in Luban. Is there a way to make the top surface smoother?

Hi there, nice design!

Kind of hard to tell from the photo, but it looks overextruded to me. So the way to make the top smoother would be:
a) adjust slicer settings so the top isn’t overextruded
b) use a Cura ironing pass to thermally/mechanically smooth the top after the final layer
c) solvent smooth it using chemicals