Talesin

I've just finished painting my armour and ready to weather it. I have an event at the end of the week and kinda presumed that Fuller's earth was something I would find at the local hobby shops. Apparently that was wrong. I've read somewhere that this could be available at hardware stores, but Lowes didn't know anything of it. Maybe it goes under another name? I'm also up in Canada, near Toronto if it makes any difference.