That area of interaction will always wear and no paint finish will withstand that errosion. You can use a plastic washer to limit that errosion.Every time I screw the handle on the post I can hear the paint scraping away
You get wear even on metal to metal interaction between handle and base plate.
Opt for a plain metal finish now or you will always be disappointed; all paint finishes are subject to chipping in use.Whether they offer a refund or a plain razor or something else entirely, I'll be sure to share whatever response I get.