The so called khols in shops are not the ithmid the Prophet sallallahu alaihi wa sallam used, and not all kohl pencils have kohl in them either. Trading Standards recently raided and confiscated thousands of pounds worth of such dangerous foreign products from an Islamic Shop in Birmingham. Honey can be applied to the eye as a wash. But I warn you, it stings like hell. Your eyes will water like you can't imagine. So go easy.
There are other types of ithmid (antimony) you can use for the same purpose. The foods and medicines that the Prophet (saw) used are all listed in 'The prophet's Book of Medicine (Tibb an Nabwi). So do invest in a copy inshaAllah.
There is a site which claims to sell genuine ithmid. But please ask for authentication before you buy. Sometimes retailers themselves don't know they are selling dangerous goods.