The REASON snow will stick to a blade - either front or rear - is the dramatic temperature differences between the blade and the snow. My tractor & rear blade reside in an unheated shed. Because of this, I have NEVER had snow stick to the blade. I have never used sprays, lube or paint as an assist.
If your tractor & blade are kept in a heated environment - bring them out into the cold for half an hour prior to use and you will notice a dramatic reduction in snow sticking.
On a warm blade, the snow melts(on the warm blade), refreezes(as the snow cools the blade) and sticks(as it freezes on the blade).
On a cold blade the snow will not melt, refreeze and stick to the blade.