Zinc plated chain for use over fires?

For a quick supply of muriatic acid go to a pool supply store and check out the acid they use for balancing PH in pools.  A lot of them use muriatic acid as the active ingredient.  Used neat it is very aggressive and will take the plating off any metal in a very short time, use appropriate PPE.  It also does a good job removing scale from hot rolled or forged items and if you use Coreten it will clean it fairly evenly so it rusts rapidly, just need to wash it off well and then neutralise afterwards.

Andrew