several? It's hard to count since i didn't print everything at once and sand all at once. i used a disk polisher at 10k rpm to get a majority of the layer lines off and some of them i hand sanded to about 240. I got impatient towards the later pieces that i printed. you could print at like .5 or .1 mm layer lines and it would be a lot finer, but print time will increase quite drastically.