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How do I get a more aggressive parkerizing finish?

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I'm using a basic parkerizing process using phosphoric acid, manganese dioxide powder, water and steel wool [linked by editor to product info at Rockler]. The results have been nice but I'm looking for a little more aggressive finish using the same chemicals maybe in a different proportion or different procedure. I've seen some parkerizing that has a crystalline appearance and that's pretty much what I'm looking for: Even a little pitting would work for me.

Thanks,

Craig Lockaby
design & manufacturing - Gladstone, Oregon, USA

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Try Zinc Phosphate Parkerizing. It is grainy in appearence and can be Blackened.

Chris Conlon
Firearm Restoration - Avon, IN, USA

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