I have posted this in bug reports too, but it may just be that some furniture items cannot yet be refurbished.
I have noticed wear appearing on a lot of household objects that cannot be resolved without re-purchasing them in build mode (ie: toilets, built in cabinets, dining chairs, tables, chess table, etc.)
Would be a lot better if every object that could show wear and tear (I like this aspect, just to be clear) could be manually refurbished rather than left to look shoddy or outright replaced. May be planned and not yet implemented, just thought I would highlight this.