Tried to edit my original post but it didn't appear so I'll post here, just looked at the Post Office website and there are restrictions and prohibitions for international mail. The following CANNOT be sent internationally:Flammable liquids, This includes mixtures of liquids or liquids containing solids in solution or suspension which give off a flammable vapour. Any liquid with a closed cup flash point below 60.5° C is prohibited e.g. acetone, benzene, cleaning compounds, gasoline, lighter fuel, paint thinners and removers, petroleum and solvents, certain alcoholic beverages, certain perfumes?? and aftershaves, varnishes and enamels including nail varnish.Also, liquids above 1 litre When sent in international post. We only have Royal Mail (P.O.) here and private couriers and I'm not sure but suspect their rules would be similar.So, maybe it depends on the flashpoint of the F.O?