i use a sharpie marker for the washes it comes out good, i cover the part entirely with the marker and use a little bit of rubbing alcohol on a q-tip to cover the part and use a good shoft rag to wipe it off, works wonderful, for the main details on the face or little details I use a gundam fine line marker, you do not want to use one of those for the inside parts or for areas that need wash, you will wreck it real quick