Hi all, I'm just wondering if the acrylic scale material that a lot of guys are using for restoring razors is a regular Perspex-type material (ie plastic stuff that's mainly used for shop-fitting and sign-writing applications)? It looks like it in many of the tutorials here, but my experience with this stuff is that it scratches very very easily (although it can take a very high polish). Are you gentlemen using some kind of special-purpose acrylic?