Getting the outline to print correctly can take some tweaking. May need to increase the size of the model to compensate for the line thickness. I found that using a .14 layer height and inner/outer wall thickness of .15 worked fine on my BambuLab A1. All other settings were pretty much default. For multi color painting, I suggest using the "Height Range" setting to paint the outline. Prints in a little over an hour with minimal waste since it only has to change colors once (depending on the accuracy of your painting)

Layer Height - .14 Outer Wall - .15 Inner Wall - .15