Your method for degreasing?
The other day I tried cold bluing some parts on a 60 year old Colt revolver I've owned since the 50's. It was exposed to a fire, wherein the burning plastic material .....chemical reaction....ruined the blueing in places, almost like rust. After sanding etc., I tried washing in hot soap/water, I tried "degreaser", and soaked in denatured alcohol....... Still I have places 'in the white' where the blue just wouldn't 'take'. So, I'm asking for your favorite method of getting steel clean. Bill
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