What effect does Kairoseki's have on Haki?
Kairoseki has no effect on haki. Rayleigh could use Haki while being chained in the auction house ( during the sabaody archipelago arc).Also haki is inborn quality in every living thing in one piece world as said by Rayleigh. And kairoseki only affects devil fruit users. Non devil fruit users are not affected by kairoseki. So they can use haki however they like still being chained.