Joe Wood ---- I have tried the ferric cloride but found that it does leave an etched surface. The dirty crank case oil has a mild sulfuric acid that doesn't seem to etch the slick surface as ferric does. I have found this very important when working on pieces with bolino scenes as they aren't dimenished in detail. Of course this is my route for graying cased metal. Ken



Ken Hurst
910-221-5288