Darpin, if your plants are Northern Lights you may not need to go to such lengths to cover the smell. Northern Lights is known for having low odor. I grew some Oasis a while back which is a type of Northern Lights and it had a very low smell, you had to touch the buds to disturb the trichomes so you could smell it. I now wish I would have stuck with this strain because at the moment I'm growing Afghani which is probably one of the most stankiest strains ever! They don't call it skunk for nothing.