A good coat of paint with a coat of clear coat Works fine.
Another trick to keep snow from sticking his leave your plow outside in the cold and out of the sun snow mostly sticks to a warm blade
Then adjust your quail for your dropspeed so when you raise your plow all the way up and hit lower it willdrop fast enough so when it hits the ground it will knock any snow off of it.
Car wax or wax from the car wash will wear off of the blade in a matter of minutes,so will Pam or anything else your smear on to the blade.
Even if you’ve used wax that is for snow skis it will wear off in a matter of hours .
Fall line used to make an industrial coating called glide. I don’t see them listing it any longer it would last a day or two under heavy use before needing to be reapplied .