Put the pared peel in a Tupperware with the acids and shake to coat the peel with the acid mix.
Leave for an hour to rest, shaking occasionally.
Juice the remaining limes and add the peel.
Blend well and strain through a sieve.
Dilute the juice with around one litre of water, and bottle.
It should keep refrigerated for around 2-3 weeks. Use for bulk margaritas and daiquiri.
