We need to be able to prevent all international countries from checking out a couple of aerosol based products (mainly due to postal laws, preventing us from shipping aerosols abroad!) I've found a reliable UK - UK courier, so that is all ok. However, I am stuck on how to prevent checkout from other countries.
We currently used Weight Based Shipping which we find gives us the best flexibility in offering the best postage prices across all our products.
Any help / advice is very very much appreciated

Thanks.