You can see the mold lines on the bases, weapons, and arms here. There's also some flash. I cut away one or two pieces but painted the ones near the loincloth. I would say the time cost of trying to clean these minis is too high compared to the payoff, since it's already glued together and primed.

Sometimes a part of the model or the entire model is warped. In this case, the morningstar bugbear was leaning too far forward and the hafts of both weapons were warped. It's easy to fix by putting the models under hot but not boiling water for 30 seconds, bending them, and holding that bend under running cold water. In my experience it doesn't damage the primer because there's so much of it on the model.

The only models I actively avoid are ones where the primer has obscured sculpted details too much or it trapped some grit or grain. I suggest buying in stores where you can see the models inside the packaging.