i have found that a cap from a mayonaise jar works just fine .......make sure you use helmans i found the kraft cap has a tendency to leak.......you might even consider a cap from a pickle jar preferably vlastic polish dillsby mr66gto - Pontiac GTO Forum
The best way clean a top is to douse it with gasoline and srub with a stiff wire brush untill you are blu in the face.If that dont work try a grinder.by mr66gto - Pontiac GTO Forum