My LIMITED experience with stainless blades in Qld. would suggest that stainless is no different to a polished bronze
prop wrt to fouling.
All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find it was vanity: but the dreamers of the day are dangereous men, for they may act their dreams with open eyes, to make it possible. T.E. Lawrence