wall putty

I made the interior polished putty Heavy Calcium Carbonate: 750kg calcium hydroxide: 250kg Hpmc: 4.5 Pva: 2 Hps: 0.6 the customer said after polishing, there is no gloss and brightness. Feels not smooth, does not look bright, what is the reason?

Recipe material to provide reference: the material of their respective regions are different, this formula can only provide a reference, not allowed to mass production before experiment. Formula: Filler: Ground Calcium Carbonate: 700kg Inorganic binder: calcium hydroxide 300kg (According to...