It's a little on the snobbery side to claim they're idiot for not knowing what Swarfega is.
I Disagree. After visiting Evans, I went to Robert Dyas, a very general DIY sore, and the shop assistant there knew immediately what I was talking about. It's an entry level thing.
Exactly, and rarely sell them, unless you're at a Halfords.
It's a little on the snobbery side to claim they're idiot for not knowing what Swarfega is.