Is it possible to remove the residue from chemically treated citrus fruits by washing or scrubbing?
I know the simple answer would be to buy organic lemons, but recently I haven't been able to find a single shop in my town or the surrounding area which stocks organic citruses. I don't really feel like making lemon curd with pesticides in it.

I always wonder this myself. My local Tesco (which is a huge, Tesco Extra), won't sell you an individual unwaxed lemon...only a net of 6. Bloody annoying because I'd quite happily pay a premium over the individual waxed ones to buy an individual unwaxed.

You can supposedly get rid of it by pouring boiling water over the lemons in a sieve. Or cold water and lots of scrubbing.

I usually get a pack of four unwaxed ones from a local supermarket. Even if I only need a couple I can make some pancakes or something to use up the others. They keep for a couple of weeks.

Panic over. I've found untreated lemons at Penny. They do look a bit manky compared to the treated ones, but I suppose that's only to be expected. Fruit shouldn't really look like shiny plastic.