You can see the infill of your print at the outside on the perimeters? In this case the infill and the perimeters overlap, and you see it on the outside of the shell. Your wall thickness might be too low in relation to the size of your nozzle.

Increase the perimeter

The effect of ghosting occurs when the shell of our print, the perimeters, are too thin and the infill, which has a too big overlap with the perimeters, comes visible. For avoiding this issue, allow the slicer to make some more perimeters. How to do that – look at the screenshots below.

Decrease outline overlaps

You want a good bond from infill and the perimeters, but you exaggerated it and the infill comes visible on the outside? Just decrease the outline overlap to 15-25% and control if you can “keep the ghost inside”.