Hi all. Am getting our entrance wall plastered at weekend - wall with 8 piers. Question is should I be using plastic or steel angle beading? When I went to get them yesterday the guy in the shop gave me steel ones - they are €1 odd a length whereas the plastic ones are €4 odd. He said it doesn't make a difference which ones i use. But I've been told since to get the plastic ones as the steel will rust in time...is this true? I can't ring the guy as I have no number for him.