I'm planning to build a fence for the yard, using 6" Cedar pickets and
ACQ lumber for the horizontal pieces.

My question is about the type of screws to use. I have been told that
the 'green ceramic' ones are what I need (they're rather expensive) as
I don't want screws that are going to rust, or do anything to discolor
the pickets.

I would appreciate your comments on this choice, please.

TIA

Lewis.