Complex sentence: One of the features of this kind of modeling is that the models are usually pre-painted, and there is no need to paint the model after completion, although some may enhance the as-built model by painting and detailing.
Split into simpler sentences: One of the features of this kind of modeling is that the models are usually pre-painted, and there is no need to paint the model after completion. Although some may enhance the as-built model by painting and detailing.