The Z5 should not be taken apart, the regular Omega can be but unless its some one who is well experienced say at least an armature gun smith, they may have problems getting it back together. Yes there are several parts that can be hone and molly or graphite will help more after honing. Also if you just leave them alone they will gradually polish them selves. I added a drop of oil with polishing compound to my Z5 at the critical points until it polished it self the washed it out with WD40 and started oiling with synthetic oil.