Has anyone used Caswell's Black Oxide kit?

slug

CGN Regular
Rating - 100%
1245   0   2
Location
Sudbury, Ont.
I'm looking for comments on how well this works on gun parts.
I'm not looking for a high quality finish, just something appropriate for milsurp rebuilding.
TIA
 
Caswells is excellent. If you want to make it work even better try a quick etch in cold muriatic acid. Depending on steel alloy you'll get something between a gunmetal and a jet black finish. Higher nickle gives a more gray finish.
 
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